Ziggurat

http://elinux.org/Raspberry_Pi_Kernel_Compilation#Ubuntu_Linux I think this might be a good place to start, I have not inspected the steps

Yes, and how to enable it, and some known problems.

According to the raspberry pi foundation the Raspberry Pi 2 supports OpenGL as of the latest Raspbian release https://www.raspberrypi.org/blog/another-new-raspbian-release/