First version of 'smooth landing' in physics.
Added (some) support for driving on walls, added documentation.
Merge remote-tracking branch 'origin/master' into soft-physics-landing
Merge remote-tracking branch 'origin/master' into soft-physics-landing
Different implementation of soft-landing.
Added more debug output.
Fix AZDO with normal/detail
Split cascade gpu timer
Try to cull object whose aera is below 1 px
Fix extra respawning particles
Don't send a second, empty GL_EXTENSION string to our stats server.
Disable features of irrlicht's contextual menu that we don't need and cause floods of warnings
Merge branch 'master' of github.com:supertuxkart/stk-code
Fix particles being killed too soon
Merge remote-tracking branch 'origin/master' into soft-physics-landing
Removed debug output, added documentation.
Partially revert marcoll pull requeust since it causes crashes and memory leaks.
corrected a typo which was earlier written as tpye instead of type
Minor fix for the (currently unused) downward impulse: only apply it
when all four wheels are touching the ground (otherwise the jump
distance is significantly shortened); also fix handling of negative
speed (plus some changes to commented out debug output).
Removed empty 'online overview' page, show the achievements page instead.