More tabs to spaces.
Added support for instancing at the mesh level.
(so far only for lwjgl because I'm lazy)
Went ahead and added in divisor support while I was
at it because it doesn't cost anything and there might
be use-cases for it.
Mesh now knows about instances and you can directly
ask it for an instance count.  I haven't added support
for proper bounding box calculation but it should
at least be possible now.
Modified the multi-slot buffer support to work even
if the buffer is not instanced.  Saw no real reason
not to and it makes buffer support more flexible.
Merge branch 'master' into scissorrenderstate

Conflicts:
	jme3-lwjgl/src/main/java/com/jme3/renderer/lwjgl/LwjglRenderer.java