Allow FullScreenSupport be compiled on older OSX.

Also make it possible to run .app preparation script without actually
building the .dmg and .zip for developing purposes.
Remove CPTBan command.

CPBan can do the same, with minimal changes to code.
Note that PlayerTBan still exists.
Enable RPATH on Linux to obsolete start-* scripts.
Remove obsolete start-* scripts.
Merge pull request #409 from lamperi/master

Some very old commits from my master branch ...
Fix minor poison heal bug