Preparing lens flare branch
Add the lensflare shader
Add 'handicapped' to player name
Don't handicap AIs
Merge branch 'master' of https://github.com/supertuxkart/stk-code into lensflare

Keep lens flare updated with master
minor modification to the blueish mood of lens flare
Merge branch 'master' of https://github.com/supertuxkart/stk-code into lensflare

Keep lens flare updated with trunk
Merge branch 'master' of https://github.com/supertuxkart/stk-code into lensflare

keep compatibility with master
Merge branch 'master' of https://github.com/supertuxkart/stk-code into lensflare
Merge branch 'master' of https://github.com/supertuxkart/stk-code into lensflare
Merge branch 'master' of https://github.com/supertuxkart/stk-code into lensflare
Use fog start value to determine density
Added more asserts.
Fixed compiler warnings.
tweak value
Merge branch 'master' of github.com:supertuxkart/stk-code
Implement scattering for point light
Fix classic fog
merge with trunk + try to adapt to the new blur system
Try to tweak the lens flare without being too obvious