Build system

[thelusiv]

The Linux automake build system for VDrift needs some work. Here are a few things that need to be done:- remove symlinks to a certain version of automake and instead replace them with scripts that find the right files regardless of the user's installed version of automake- add an install target so VDrift can be installed system wide- make the configure script check to make sure OpenGL headers are installed (currently it doesn't check; if they're not there the game will compile and link OK, but segfault when trying to initialize the GL stuff)- update all the build system related files with a new set from automake