Remove ioquake3 references from README

Removed ioquake3 references from README per zakk's request.
Resolved issue #75 (for JK2 only, JKA is slightly different)
Closed issue #75, with full support for Cvars in ICARUS (in SP) using get/set.
Wampas are no longer affected by knockback. No more chucking wampas across the map using Lightning Level 3 for you!
Added various checks to anything involving parse sessions (if(parseDataCount < 0)), since there are a LOT of areas in the code which are accessing mem that they shouldn't be!
Fixed HUGE memory problems with the parser. Fixed issue #81 with this build.
Fixed a buffer overwrite error in COM_ParseExt.
Removed notice about SP mods and added IRC channel to Readme file.
Added code for bactas to work properly in JKA mode. You'll need to modify items.dat though in order for a full, working bacta.
Fixes for the ingame and viewlog console on SP
Reverted part of 'fix' to COM_ParseExt that was wrong.
Fixed Cmd_RemoveCommand in SP not freeing memory.
Adds fs_homepath cvar to sp (blank for now).  Some other fs fixes.
This function is only valid in debug mode
Fix using a string array before it was set in SV_Map_