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
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.
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.
Working, but hideous, DDS loading code.
1 stupid typo and forgetting to cap the mip chain.
Rearranged it so that toggling the labels progresses through disabling the labels, then drawing the GUI at all, then drawing labels and the GUI again.
Currently all on the default key `TAB`.
Some tidying up, an extra assert, whitespace fixes.
Cleanup PicoDDS a little bit.
Renamed PicoDDS methods/functions to start UpperCase.
Removed some more bits.