Eliminated the theme folder and theme.css since it's not necessary
anymore. The CSS file was only needed for the Flex compiler to suppress
a compilation warning but the latest SDK doesn't seem to complain
anymore.
Changed folder names and hierachy to new structure.
Moved the base engine code to src/engine. The game, game2D and game3D
extras are temporarily removed and later integrated into the base
engine.
Updated the build files related to compiling the engine SWC and API
docs.
Updated the main build file to adapt to the project structure changes.
Updated FDT build file.
Minor string update in build files to be consistent with path naming.
Updated output paths in .fla files.
Added updated Tetragon project template zip for FDT.
Small fix in build.xml where 'libs' and 'resources' folders
weren't packed into distribution.
Tetragon Engine version: 1.1.0 build #10961 Centauri
Published latest distribution.

There is still an issue with the Fla files and fonts when these are
published on Mac: for some reason the fonts embedded in the project
asset SWC are not visible in the compiled demo. The Windows-published
SWC works nicely, just not the Mac one, even though the required fonts
seem to be installed correctly and valid.