Dronekit

Improvements
* Catch and display message and attribute errors, then continue
* Improved takeoff example docs
* Deploy docs on successful merge into master (from CircleCI)
* Drone delivery example, explain port to connect
* MicroCGS example now uses SITL
* Make running examples possible on Vagrant

Bug Fixes
* Mav type for rover was incorrect
* `_is_mode_available` can now handle unrecognized mode codes
* Fix broken links on companion computer page
* Fix infinite loop on channel test

Bug Fixes

* Use monotonic clock for all of the internal timeouts and time
measurements
* Docs fixes

New Features

* PX4 compatibility improvements

Updated Features

* Documentation fixes
* PIP repository improvements
* Mode-setting API improvements
* ardupilot-solo compatibility fixes

Bug Fixes

* Splits outbound messages into its own thread.
* Remove of capabilities request on HEARTBEAT listener
* Check if mode_mapping has items before iteration

New Features


* Gimbal control attribute
* Autopilot version attribute
* Autopilot capabilities attribute
* Best Practice guide documentation.
* Performance test example (restructured and docs added)

Updated Features:

Many documentation fixes:

* Restructured documentation with Develop (Concepts) and Guide (HowTo) sections
* Docs separated out "Connection Strings" section.
* Improved test and contribution sections.
* Updated examples and documentation to use DroneKit-Sitl for simulation ("zero setup examples")
* Debugging docs updated with additional libraries.
* Flight Replay example fetches data from TLOG rather than droneshare
* Drone Delivery example now uses strart location for home address.
* Disabled web tests (not currently supported/used)
* Updated copyright range to include changes in 2016

Bug Fixes

* Numerous minor docs fixes.
* Harmonise nosetest options across each of the integration platforms
* Fix incorrect property marker for airspeed attribute

Bug Fixes:

* Updates `requests` dependency to work >=2.5.0