Sorry, but this time the bunnyhopping issue should really be solved...

Sorry, but this time the bunnyhopping issue should really be solved...
applying some fixed amount of friction on LANDING. Please try
test_bunny_vs_aircon (undo: test_bunny_vs_aircon_undo).

The old attempt did not work because the time on the floor depends on
sys_ticrate. Applying a modified friction when jumping does NOT work (works
well for the timing, but causes strange movement for low ticrates), so an
additional field was added.

git-svn-id: svn://svn.icculus.org/nexuiz/trunk@1197 f962a42d-fe04-0410-a3ab-8c8b0445ebaa