Ydk

* Support for Python3
* Introduced support for Python 3 ([60](https://github.com/CiscoDevNet/ydk-gen/issues/60))
* Both Python 2 and Python 3 are now supported for `ydk-gen` and `ydk-py`

* Bundle improvements
* Improved usage of import statements in YDK model API to reduce chances of circular import dependency ([216](https://github.com/CiscoDevNet/ydk-gen/issues/216))
* Updated [`cisco-ios-xr` bundle](https://github.com/CiscoDevNet/ydk-gen/blob/master/profiles/bundles/cisco-ios-xr_6_1_1.json) to support Cisco IOS XR 6.1.1 release ([#258](https://github.com/CiscoDevNet/ydk-gen/pull/258))
* Updated [`openconfig` bundle](https://github.com/CiscoDevNet/ydk-gen/blob/master/profiles/bundles/openconfig_0_1_1.json) ([#258](https://github.com/CiscoDevNet/ydk-gen/pull/258))

* Documentation improvements
* Improved documentation for bundle installation ([244](https://github.com/CiscoDevNet/ydk-gen/pull/244))
* Added documentation for executor service ([263](https://github.com/CiscoDevNet/ydk-gen/pull/263))

* Introduced YDK bundles ([43](https://github.com/CiscoDevNet/ydk-gen/issues/43), [#148](https://github.com/CiscoDevNet/ydk-gen/issues/148), [#149](https://github.com/CiscoDevNet/ydk-gen/issues/149))
* Created YDK core library and pluggable namespace packages that share the same module prefix `ydk.models`
* Generated documentation for YDK core and bundles

* CRUD service / Codec service / Netconf service improvements
* Improved support for presence containers, nested enum and identity classes ([169](https://github.com/CiscoDevNet/ydk-gen/pull/169))
* Improved support for lists with multiple keys by ensuring that the order of keys is preserved ([179](https://github.com/CiscoDevNet/ydk-gen/issues/179))
* Improved support for leaf-list of identity type ([186](https://github.com/CiscoDevNet/ydk-gen/issues/186))
* Added check for user error which can occur when self-referencing YDK object as parent object ([184](https://github.com/CiscoDevNet/ydk-gen/issues/184))
* Improved error-reporting for commit-time error ([190](https://github.com/CiscoDevNet/ydk-gen/issues/190))
* Fixed CRUD read support for modules containing top-level list ([194](https://github.com/CiscoDevNet/ydk-gen/issues/194))

* Testing improvements
* Added Mac OS X installation and running codec service sanity tests to CI ([175](https://github.com/CiscoDevNet/ydk-gen/pull/175))

* Documentation improvements
* Indicated mandatory leafs in the documentation ([177](https://github.com/CiscoDevNet/ydk-gen/issues/177))
* Specified path to referred leaf for leafrefs ([177](https://github.com/CiscoDevNet/ydk-gen/issues/177))
* Fix documentation of presence containers ([192](https://github.com/CiscoDevNet/ydk-gen/issues/192))
* Enhanced documentation of leafs of identityref type by indicating all the subclasses of identity base class referred to by the identityref ([161](https://github.com/CiscoDevNet/ydk-gen/issues/161))
* Added documentation on how to use YDK delete operation and improved documentation for YDK read operation ([204](https://github.com/CiscoDevNet/ydk-gen/pull/204))

* Error handling improvements
* Fixed local validation to correctly check for types and values ([116](https://github.com/CiscoDevNet/ydk-gen/issues/116))
* Introduced error hierarchy to represent errors from various components, viz.: YPYModelErrors, YPYServiceError, YPYServiceProviderError ([133](https://github.com/CiscoDevNet/ydk-gen/issues/133))
* When raising YPYModelErrors, include errors dictionary with key as path to data, and value as tuple of error code and error message
* Added more extensive negative test cases to ydk-gen to test handling of error ([134](https://github.com/CiscoDevNet/ydk-gen/issues/134))
* CRUD service / Codec service / Netconf service provider improvements
* Added support for multiple objects to codec service ([122](https://github.com/CiscoDevNet/ydk-gen/issues/122))
* Added logging for codec service ([97](https://github.com/CiscoDevNet/ydk-gen/issues/97))
* Have logging hierarchy automatically follow package hierarchy ([100](https://github.com/CiscoDevNet/ydk-gen/issues/100))
* Have netconf service return YDK python objects instead of XML strings ([120](https://github.com/CiscoDevNet/ydk-gen/issues/120))
* Fixed decoding issue with leaf-list of enums ([150](https://github.com/CiscoDevNet/ydk-gen/issues/150))
* Removed requirements.txt from ydk-py and added all requirements to setup.py
* Enforce PEP8 naming for Identity classes ([152](https://github.com/CiscoDevNet/ydk-gen/issues/152))
* Added full ydk-py version to the documentation ([144](https://github.com/CiscoDevNet/ydk-gen/issues/144))

* Added openconfig bgp-policy APIs to ydk-py ([102](https://github.com/CiscoDevNet/ydk-gen/issues/102))
* Introduced ability to programmatically retrieve SDK version of ydk-py ([8](https://github.com/CiscoDevNet/ydk-gen/issues/8))
* Removed unused dependencies from ydk-py's requirements.txt ([48](https://github.com/CiscoDevNet/ydk-gen/issues/48))
* Introduced [coveralls](https://coveralls.io) and improved [travis CI](https://travis-ci.org) integration for ydk-gen github ([#84](https://github.com/CiscoDevNet/ydk-gen/issues/84), [#54](https://github.com/CiscoDevNet/ydk-gen/issues/54), [#15](https://github.com/CiscoDevNet/ydk-gen/issues/15), [#46](https://github.com/CiscoDevNet/ydk-gen/issues/46))
* CRUD service / Netconf service provider improvements
* Added timeout parameter to NetconfServiceProvider ([1](https://github.com/CiscoDevNet/ydk-gen/issues/1))
* Fixed issues with decoding leafs of union type and nodes defined in sub-modules ([5](https://github.com/CiscoDevNet/ydk-gen/issues/5), [#56](https://github.com/CiscoDevNet/ydk-gen/issues/56))
* Fixed issue with encoding enums, identities defined in external modules ([30](https://github.com/CiscoDevNet/ydk-gen/issues/30), [#103](https://github.com/CiscoDevNet/ydk-gen/issues/103))
* Improved support for deleting leafs, leaf-lists and lists ([55](https://github.com/CiscoDevNet/ydk-gen/issues/55), [#103](https://github.com/CiscoDevNet/ydk-gen/issues/103))
* Documentation improvements
* Added 'About ydk-py' page with information about ydk-gen used to generate ydk-py ([6](https://github.com/CiscoDevNet/ydk-gen/issues/6))
* Indicate in documentation YDK class attributes that are keys ([41](https://github.com/CiscoDevNet/ydk-gen/issues/41))
* Made top containers show up at the top of the table of contents for every module document ([39](https://github.com/CiscoDevNet/ydk-gen/issues/39))

* Introduced netconf service and codec service
* Netconf service provides APIs to execute netconf operations
* Codec service provides APIs to encode python objects and decode payloads
* Support for yang deviation
* Support for subscribing to model-driven telemetry
* Logging made more consistent
* CRUDService outputs type of operation
* When logging is enabled, all NETCONF messages are logged including commit
* Log messages at various stages (send RPC request, receive reply, commit
etc) instead of logging all at once at the end
* Updated enums in YDK classes to use enum34
* Improved enum documentation
* Improved error reporting for ydk-py and ydk-gen

* First public release.