Add glDrawBuffers.
Merge pull request #112 from kanelbulle/add-gldrawbuffers

Add glDrawBuffers.
Add BindTarget and UnbindTarget.
Add more explanatory doc for Bind, BindTarget, Unbind and UnbindTarget.
Merge pull request #114 from kanelbulle/fix-framebuffer-bind

Add BindTarget and UnbindTarget.
Workaround for #104 glGetShaderSource
Reduce documented minimal glew version to 1.5.4
Merge pull request #106 from pwaller/issue-104

Workaround for #104 and document new minimal glew 1.5.4
Fixed compilation errors relating to issue 104
Merge pull request #115 from bluepeppers/master

Fixed compilation errors relating to fix for issue 104
Add Program.BindFragDataLocation and Program.GetFragDataLocation
Merge pull request #117 from kanelbulle/add-bindfragdatalocation-getfragdatalocation

Add Program.BindFragDataLocation and Program.GetFragDataLocation
Added glDrawElementsBaseVertex()
Merge pull request #118 from pakanek/elemBaseVert

Added glDrawElementsBaseVertex()
Adds CGO build flags for freebsd.
This address issued #119
Merge pull request #120 from jteeuwen/master

Adds build flags for freebsd.
added function to do instancing
Merge pull request #123 from krux02/master

added function to do instancing
Added glPrimitiveRestartIndex()
Merge pull request #124 from pakanek/primRestartIndex

Added glPrimitiveRestartIndex()