Merge pull request #1 from obviousjim/master

OBJ Loading/Saving through ofMesh
Merge pull request #2 from obviousjim/master

Fixes off by one bug!
linux compatible
Update example Xcode project
Add loadGroup function
Fix minor bug & add polygon flip feature
Fix vertex index bug on save
Add vertex color loading
Add flip-face and flip-normals options
Add export vertex color as texture
API simplify
Add example-export-vertexcolor-to-texture project
Fix minor bug
Fix uninitialized texture path bug
merge
commented out createEnclosingDirectory
swapped exit(1) for return
moved glm lib files into a libs/glm
Merge branch 'merge-in-Satoru's-changes'