Moved constructors to bottom of headers
Added initialisation list to Sprite class

Added:
- initialisation list to sprite clas

Modified:
- some structures in Sprite class header

Conflicts:
	Sprite.h
Added initialisation list to Render class

Added:
- initialisation lists to Render

Modified:
- some structures in Render header
Added Thing class
Merge branch 'devel'

Fixed Render and Sprite. Both supports initialisation lists.
Also created class Thing.