Two little enchancements

I have two little enchancmenets which was made by me (in my own Legacy sources).

1) Surround Sound (like Dolby Surround). All sound events which happens behind the player can be heared at your back (if Dolby ProLogic decoder was installed). It is DolbySurround scheme where back-channel (surround channel) encoded into two main stereo channels.

2) Weapon dropping. When feture activated frags will be drops weapon from hand. Weapon drops with all ammuntion for this weapon. Unreal-style behavior.

If you're interested I'll send Win32-executable to Legacy team to testing this extensions (for possiblilty to use in future versions of Legacy). Source code also available.