Remove PIXHAWK specific board support

Ensure that the show event handling of the op map widget only creates on...

Map widget: make all connections that might suffer from multiple connect logic issues unique, found by Nyaruko

Bug fixes

This way OS X correctly positioned menu items

Auto pilot plugin architecture

This allows you to filter the list of parameters the widget displays.

This allows you to determine if full parameter list is ready if you
missed the parameterListUpToDate signal.

Create master/slave relationship for styles

Set mode compatibility with jMAVSim

Also fixed bug in loadStyle

Bump minor version to 2

Prepping for stable 2.2 release

Better error reporting during Firmware Upgrade

The dark css is the master and contains all style information. The
light css is the slave and only contains color information.

Delete generated UIC files

This allows you to filter the list of parameters the widget displays.

This allows you to determine if full parameter list is ready if you
missed the parameterListUpToDate signal.

Mock implementation of a Link

This is the Pixhawk research board, not the PX4 production board.