Update ofxAssimpModelLoader.cpp

Load models in binary, not text mode.  fixes issue #1932 - ofxAssimpModelLoader example fails when loading 3DS model (when pressing '5')
Merge pull request #2830 from ed-was-here/bugfix-#1932

Update ofxAssimpModelLoader.cpp
Merge branch 'master' of https://github.com/openframeworks/openFrameworks.git into VS2013