Merge pull request #69 from jra101/master

Proposed fix for renderbuffer objects
Merge remote-tracking branch 'github/cass' into nstewart
Refresh VC projects to resolve TargetPath warnings
GL_TEXTURE_BORDER_COLOR needs to be stored as GLfloat instead of GLint
Fix Dsa emulation of renderbuffer objects
Disable Emu::So if GL_ARB_sampler_objects is available.
For github issue #73
Merge pull request #3 from p3/nstewart

Disable Emu::So if GL_ARB_sampler_objects is available.