Improvements to GPLose scene, similar to previous work on GPWin
Fix #1347.
Added FIXME and some comments so that we can look at this
strange call again when more networking code is added.
Don't create icons for guests (which are never shown).
add a reverse spinner
Merge branch 'master' of https://github.com/supertuxkart/stk-code into a
Remove bogus check
Fix SSAO perf

I was using wrong mipmap count for linear depth rtt.
Spped up SSAO

Avoid using cos/sin too much, use sum of cos/sin formula instead.
Speed up SSAO again

Use log2(xy) = log2(x) + log2(y), and approximate log2(alpha) =
log2(previous alpha) + .5.
Log2 is indeed a costly instruction.
Simplified isInGroup test.
use isInGroup, and minor cosmetic changes.
Sort karts by locked/unlocked state (and then alphabetically).
Merge branch 'master' of github.com:supertuxkart/stk-code
Fixed assertion in GP editor.
Fix 'remember password' setting being not remembered.
Do not write specular value in gi/diffuseenvmap
Use a big triangle instead of 2 to cover full screen.

This allows to rasterize a single primitive instead of two, and avoid
trashing the cache between the 2 triangles drawing.
Another round of big triangle port.
Gather bloom effect to avoid extra texture read.

I have a .5ms win here...