Added more generated files to the .gitignore.
More HIL config options
Updated Linux build info in readme

Remember to init submodules for "qupgrade"
Merge pull request #481 from bjarkevad/master

Updated Linux build info in readme
Merge pull request #477 from Susurrus/gitignore

Added more generated files to the .gitignore.
Update build dir
Merge branch 'master' of github.com:mavlink/qgroundcontrol
New version of submodule
Upgraded qupgrade version
Enable RC calibration mode during RC calibration to tell vehicle to ignore stick inputs for that period
Supporting RC config better for PX4 vehicles, no functionality changes for other systems
Added new icon, not hooked up to code yet
PX4 config: Insist on correct throttle position before accepting RC config end
Leave out confusing technical detail. Just tell the user we’re done.
PX4 config: Cleanup in RC value handling.
Use the reversed values for the four control channels as well. Not using them would make the display very confusing.
PX4 config: Remove the specialized throttle handling - this needs testing, but doing the math on paper it doesn’t look like a special case is needed / wanted here.
Fixed MockUAS methods
Fix up Mac console build
MAVLink update