Change parameters of TransformFeedback::setVaryings from const char * to std::string
Merge pull request #268 from mrzzzrm/transform_feedback_string_params

TransformFeedback::setVaryings(): Take std::string instead of const char*
Add ARB_program_interface_query function calls, fix #267
Access container data using data() instead of operator[], #267
Program::getResourceName(): Early out if nameLength == 0, #267
Use c_str() instead of data() for std::strings again, #267
Query glGetError() before assuming that the value returned by getResource() is sane, #267
Remove Program::getResourceName() convenience method for now, #267
Merge pull request #269 from mrzzzrm/ARB_program_interface_query

Add ARB_program_interface_query function calls and convenience methods
Adapt examples to new transform feedback interface
ignore osg-example compiler warning (introduced in osg 3.3.1)
Merge branch 'master' of github.com:hpicgs/glow