Try to tidy up the eclipse shaders so they're a little more GLSL120 compliant in the hope that it'll make Tichy's open source AMD driver work. Totally blind.
Damn this is complicated.
Merge branch 'master' of git://github.com/pioneerspacesim/pioneer into simplfyEclipse
Just pick from the matrix rather than doing if tests
Pre-divide srad and lrad, pass them through as a uniform.
Pass the inverse (??? i.e. 1.0 / NUM_LIGHTS) value through as a #define to the shader to avoid calculating it per fragment. Means I can avoid two divides within some nested loops.
Oops, fix that last commit!
split shadowCentre into vectors of components
fix bad bracketing in atmos eclipse shader
apply eclipses to sunsets
Merge branch 'master' of git://github.com/pioneerspacesim/pioneer into simplfyEclipse

Conflicts:
	src/graphics/gl2/GeoSphereMaterial.cpp
documentation fix: Game.LoadGame doesn't return anything
implement Game.EndGame()
add Game.SaveGame()
Just added the PicoDDS library so far.
Disable the GUI rendering on a key combination press, ctrl-Tab
Still hilariously hacky.
Displays as much of the system path as it has the info for.
fix for #2267
Compiling and linking, loads the DDS textures.
Fails to run with an OpenGL error.
Still trying to work it out, in Release I just a fluorescent green ship.
In Debug I get GL_INVALID_VALUE but not sure where from.
fix for #1850