Reducing size of AppImage (removing unused and duplicate files during freeze)

Removing unused files from linux freeze.py script. It includes many hundred MB of unused files or duplicate files.

Improving video widget resize logic (by width, or height)

Adding optional version.json to /settings/ folder during build. 

Adding frozen version to About and launch logs, to make it very clear when and what build version is running on a user's computer (in cases where they are running the frozen version).

Fixing resize of video widget to support both height and width resizing, and being always divisible by 2 on both dimensions.

Adding optional version.json to /settings/ folder during build. This is a dump of all 3 repos version info used in this build, including the current date/time. Also, some refactoring of build url naming and version parsing (used by both freeze and build-server.py now.

Use ColorPicker for all color dialogs

project_data: New keyframe scaler implementation

New OpenCV Effect Pre-Processing UI

Copy *.log files into new lib/settings/ folder (on Mac OS)

STY: Use enumerate, avoid Yoda conditions

Titles: Rewrite XML parsing/mods, add style_tools

Relocate libopenshot.log recovery code to exceptions.py

Timeline CSS: More visible keyframe marks

Webview: Show menus with exec_()

Blender: Tweak dissolve.py parameters to fully complete animation before last frame

Update copyright in README

Fix Mac OS Git *.log files (on Mac builder)

Add minimum os version to Info.plist

Add minimum os version to Info.plist, so we don't attempt to install on an older system which will fail.

Add minimum os version to Info.plist, so we don't attempt to install on an older system which will fail.

Exclude a few more files from the mac build (tesseract and related)

Exclude a few more files from the mac build. Trying to avoid a crash related to tesseract and libgif dependencies

Exclude a few more files from the mac build. Trying to avoid a crash related to tesseract and libgif dependencies

Fix the Qt gif dependency on the mac build server