Remove PIXHAWK specific board support

This is the Pixhawk research board, not the PX4 production board.
Support for new parametersReady method

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

This allows you to filter the list of parameters the widget displays.
Reorder top level buttons, new VehicleSetup code
Call AutoPilotPlugin instead of hard-wired code
New AutoPilotPlugin and VehicleSetup
Create master/slave relationship for styles

The dark css is the master and contains all style information. The
light css is the slave and only contains color information.
Remove goto style error handling overkill
Fix compiler warning bugs
Remove numbers from buttons
Remove support for user style file
Remove support for user style file

Also fixed bug in loadStyle
uas: hack to include HIL bitfield when UAV is in HIL mode but not through QGC
Merge pull request #984 from julianoes/fix_hil_jmavsim

Set mode compatibility with jMAVSim
Merge pull request #980 from DonLakeFlyer/StyleFix

Create master/slave relationship for styles
Support for new parametersReady method

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

This allows you to filter the list of parameters the widget displays.
Reorder top level buttons, new VehicleSetup code
Call AutoPilotPlugin instead of hard-wired code
New AutoPilotPlugin and VehicleSetup