hdiutil called from inside macdelpoyqt was failing. Managed to get it
not to fail by changing layout to SPUD instead of GPTSPUD.
Unfortunately know idea why this works!

Second pass at moving joystick settings into general settings dialog window

This has been sitting for comment for a couple days. Code review is good and change makes sense. Merging.

Modified to use new FILE_TRANSFER_PROTOCOL message

Otherwise we can end up generating strange CRCs.

- Also corrected system/component id usage
- Switched to new Qt5 connect api

No major functionality changes.

Fix unit test crash rom Pull 840

Fix Linux compiler warnings from Pull 840

Updated RC Cal validation rules

Also uses new min/max/invalid widget display

handle wgs84 altitude correctly, AMSL also displayed in ft

RC Calibration Updates

emit roll, pitch and yaw setpoints for plotting

also adds AMSL output in ft

- Updated to use RCChannelWidget
- Removed attitude control widgets
- Previous calibration values now shown when not actively calibrating

Left QGCRadioChannelDisplay alone so that I didn’t need to modify all
the other APM board code which uses this control. Also new control only
support horizontal orientation, with no plans to add vertical.

Threading fixes

Path through code allowed for xmlfile to be used when file was not
opened. Also changed qWarning->qDebug to allow QT_FAIL_WARNINGS to be
used to find bugs.