Remove ambient occlusion darkening from all deferred shaders except the one that actually calculates occlusion values.. (aka every shader except class2/softenLightF.glsl)
Fatal paranoia cure
This should make the cache-full situation a lot more benign

I should be ashamed of myself, i took ugly, terrible code and uglied it up even more.
Stop occasional crash during shutdown
Pulled SSAO out into its own shader to support running at a lower-than-native framebuffer resolution (defaults at half-resolution [SHRenderSSAOResolutionScale=.5] ). This doesn't improve the slow ssao/shadow softening, however, as that bit remains unchanged.
Fix 'setBuffer: Shader consumption mismatches data provision.' error in LLPipeline::updateCull. Issue caused by LLDrawPoolAlpha not unbinding shaders when only basic shaders are enabled.  https://code.google.com/p/singularity-viewer/issues/detail?id=1281
Merge branch 'master' of https://github.com/Lirusaito/SingularityViewer
Merge branch 'master' of https://github.com/Shyotl/SingularityViewer
Merge branch 'master' of https://github.com/singularity-viewer/SingularityViewer