Obj file material load

Add colored material loading to Obj Loader.
Fix an issue with OBJ files containing # comments (as some tools insert these on export)

The patch works against master or appRewrite.

I followed the steps on https://forum.libcinder.org/topic/suggested-process-for-contributing-code-is-there-one but this pull request includes everything from the appRewrite branch. I've tried every command line variant I can think of, but can't get a pull request with only my change. Any ideas what I might have done wrong?

My change is way down on the bottom of the request, can it be cherry-picked?

Here's a direct link to the diff.

https://github.com/meshula/Cinder/commit/ef7bdf808ad5366e5fff3899c1851812882898d6