Adding NASTLH to the AI
added also gatech to the AI ...
Remove static state from ChromeProvider.
Remove obsolete PackageContents array from Manifest.
Disabled changing e7's stances
Load assets using absolute paths.  Fixes #6717.
Cache the support dir path.
Merge pull request #6722 from abcdefg30/disable_tanyas_stances

Disallow changing tanya's stance on allies01
build with previous latest mono 3.8
Merge pull request #6726 from Mailaender/travis-mono-3.8

Updated the release build servers to Mono 3.8
Merge pull request #6694 from LipkeGu/ai_update

[TS] Add Nod Stealth Generator and GDI TechCenter to the AI
Merge pull request #6724 from pchote/absolute-paths

Load assets using absolute file paths
Add an aspect ratio correction flag to VqaPlayerWidget.
Make the video cancel hotkey configurable.
Prevent mouse events from propagating through a video.
Fix the title of the TD missions panel.
Add support for mission groups.
Add support for briefing videos in the mission menu.
Upgrade TD missions for the new mission chooser.
Upgrade RA missions for the new mission chooser.