Official engine name

[tomangelo]

One thing: TerranovaEngine is good name for engine that will run Colobot: Gold Edition, but we will have to keep in mind that we shouldn't use this name as engine for original Epsitec games. It's strongly modified, but still the same engine.
So maybe TerranovaEngine for games on renewed engine, and 'EpsitecEngine' as a name for original engine? (or another, for me it's just strange to use 'TE' for original engine, so 'EE' is just an alias for "engine that was running original Epsitec games').