For the skeleton example, it maybe miss on parameters for calling readOFF function

[etrigger]

if(!igl::readOFF(filename,vV,vF,vN)) maybe miss one parameter for rgb color values
vector<vector >vC;
if(!igl::readOFF(filename,vV,vF,vN, vC))

I'm working on windows, I have to remove this line in skeleton/example.cpp:
glutInitDisplayString( "rgba depth double samples>=8 ");
Otherwise, I will receive 'pixel format with necessary capabilities not found'

BTW, I add glFlush() before glutSwapBuffers() to avoid a white screen window.