Merge pull request #5 from Vswe/master

Added a TechneConverter for angles
Added credits button.
Moved TechneConverter to iChunUtil, it's needed there, not here.
Disable CULL_FACE when rendering model cause living entities are like that.
Lots of things, Cut Copy Paste PasteInPlace EditProject TextureDimensions ImportProject ChatSound ClosingProjects ExitSavePrompt etc.
Partially working Group and child support.
Slightly more functional groups and childs.
Finish up on groups and child models.
Deletion of Child and Group objects. Untested.
Change scaling from additive to multiplicative.
Children shouldn't have scale cause parents do it for them.
Why is that imported? Fixed to actually allow compile.
Adjust scroll for model tree and number input.
Add exit Tabula button
Fix tooltips rendering below the screen
Fix crashes with null classes in models?
Added exit tabula localization
Update testers list.
Copying groups and settings objects as hidden.
add a minmax for rotation.
Basic exporting. Complete Texture Map exporter as well.
Basic Exporting.
Added the ability to select model parts by clicking on them in the rendered model.