Added Irrlicht 1.8, but without all the Windows binaries.
Remove EFL, since it's been released now.
Remove unused LuaJIT 1.1.7, since the 2.0 version works fine.
Don't actually build EFL, though it should do so in the future, but from downloaded released source tarballs.
Ignore Irrlicht built files.
Let Irrlicht use an externally created OpenGL context and surface.

Linux only for now.  Others can come later.
Added note about netsurf.
Ignore extantz executable.
Added more media, including a link to the Irrlicht media, and some images from the ePhysics examples.
Major rework of extantz to get Elementary, ePhysics, Evas_GL, and Irrlicht to play nice together.
Not sure if I can distribute the XMRE description document, so ignoring it to be safe.