Quake 4 v1.3 to 1.4.2 Patch for Windows

* player lean, player models lean in the direction of movement
use g_playerLean to scale or disable the effect (client side)
* fix wallhugging on ramps
fix also makes ramps slightly faster
* horizontal speed fully maintained when crouch sliding and hitting a ramp
previous version had a little dip
1.4.1 had a bug that caused a sharp speed drop (this is also fixed)
* RG ammo box 10->7
change was initiallly advertised in 1.4.1 but didn't make it in
* si_fps limited to 90fps for q4mp/, now declared in gamecode so mods can change their max