NOTE: Requires update-workspaces!
Adds build script for OS X dependencies, fixes #1112. OS X builds no longer use MacPorts/Homebrew, check BuildInstructions.
Adds build script for OS X bundles. Adds OS X icon and DMG background image.
Moves bundled libraries to libraries/source.
Moves most headers and precompiled static libs for Windows to libraries/win32.
Updates Premake and packaging scripts to support this.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@13148 3db68df2-c116-0410-a063-a993310a9797
Add tribute stats to the summary screen. Patch by alpha123. Fixes #1831.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@13149 3db68df2-c116-0410-a063-a993310a9797
Merge remote-tracking branch 'remotes/trunk'