Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Corrected over-zealous check for GPSD / UDP Output addresses
Merge remote-tracking branch 'upstream/master'
Apply Context menu general Font at Grib-pi menu for windows
Merge remote-tracking branch 'upstream/master'
Correct AIS Alert dialog to include "Acknowledge" button
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge pull request #139 from seandepagnier/master

I have made several corrections to the vector chart rendering
Merge pull request #140 from Ptizef/master

Apply Font choice to grib_pi context menu
Merge pull request #141 from stripydog/master

Corrected over-zealous check for GPSD / UDP Output addresses
Correct track recoding logic on startup and invalid GPS signal.
Merge remote-tracking branch 'upstream/master'
add button to rebuild the opengl texture cache
Improve cm93 bitmap performance
Implement deferred/thread texture compression.
Revert "Implement deferred/thread texture compression."

This reverts commit 77fc96ea999b98fa90cbe4bbed0f0c35a820c6a8.