Implement textures for meshes

[rossant]

Not sure what the API could be like (need to provide the texture and UV mapping).

[bollu]

@campagnola, @Eric89GXL do we have a plan for this? It would be nice if this could be bundled with all the sweeping changes we have right now

[larsoner]

I think this can be tackled after the big merge. So you can start working on it now but we shouldn't put it in Luke's PR.

[campagnola]

+1
The less we can bundle, the better. All we really need is for the examples to run and unit tests to pass.
Sorry I've been absent lately; will be back home in a few days.

[kmuehlbauer]

@djhoese What has to be done here in addition to what'sn already implemented in #1444?

[djhoese]

I guess nothing. The TextureFilter does everything that this issue originally wanted (if I had to guess).