TE4 can now handle multiple versions of the same engine (or even different...

TE4 can now handle multiple versions of the same engine (or even different ones). Engines are located in game/engines and the default one in game/engines/default
Game engines can also come in archived form in a .teae zip file


git-svn-id: http://svn.net-core.org/repos/t-engine4@1110 51575b47-30f0-44d4-a5cc-537603b46e54