Pykerio

- New struct DnsForwarder
- New list type DnsForwarderList
- New struct DnsConfig
- New struct DnsHost
- New list type DnsHostList
- Changed license from GPL-2+ to GPL-3+
- Added icons
- Inherited enumerations from Enum
- Changed OptionalStringList from list to struct
- Added interface Dns

* New interface IpTools

* New interface Ports
* New interface FilenameGroups
* New interface Server
* New interface Storage

* Implemented the **Interfaces** interface
* Added many types, structures, enumerations and lists
* Added test cases for every type, structure, enumeration, list and interface
* Added KERIO_SERVER, KERIO_PORT, KERIO_USERNAME, KERIO_PASSWORD, KERIO_BOX, KERIO_READONLY, KERIO_HAS_WIFI environment variables to specify values for test cases
* Enabled test cases for public kerio test server
* Updated README with some examples usage

* Added Travis CI support
* Added CircleCI support
* Added Unit testing
* Added Coverage tests
* Added badges

* First release.
* Includes Application, Session and HardwareInfo interfaces only