RenderableDepot is now a reality!

Replacement for ReactorDepot.
Added TextLabel
Adds testing fonts in assets
Fixes to TextLabel
Several optimization for fonts

Now VRAM is not used for each new label
Added a way to handle errors in RootObject
TextLabel now validates textures in package
Minor fix
Merge branch 'bitfonts' of https://github.com/Itaros/gossip into Itaros-bitfonts