Added GL_TRUE and GL_FALSE
Use c_uchar for gl2::TRUE and gl2::FALSE
Fix warnings with latest rust.
Merge pull request #43 from metajack/rust-up

Fix warnings with latest rust.
Merge pull request #21 from chinmaygarde/accc977a5ba3c47a1c1565393c5e0f3c2b56be47

Add GL_TRUE and GL_FALSE
Merge branch 'master' of https://github.com/mozilla-servo/rust-opengles into q3