Update QWT version. This commit breaks building until the followup changes are committed.
Update all non-AQ-specific plotting/graphing modules to use latest QWT. Thanks in large part to the main QGC project!
Final fixes to allow building with Qt 5 !!!  Still some kinks to work out, so keeps Qt4 compat. for now.
Update AQ Log viewer for latest plotting library updates and re-work the UI a bit;
Remove the "LOG_" prefix from log field names;
Use colored icon for legend instead of label background.
Update AQ motor mix/ports config UI for Qt5 and minor UI tweaks.
Remove the utils library since it's no longer needed.
Update main project file to reflect all the changes to date.
Simplify some mavlink slot/signal code and update MAVLinkDecoder. Decoder now runs as its own thread.