removed CL_InitTEnts function, moved its contents (cl_sfx precaches) to CL_ParseServe...

removed CL_InitTEnts function, moved its contents (cl_sfx precaches) to CL_ParseServerInfo
removed beam precaches from the beam parsing code to CL_ParseServerInfo so that the precaches are made each level (when it unloads models/sounds) rather than only once (ever!) during the game, this fixed crashes and rendering issues (using the wrong model) with lightning beams
renamed cl_sfx_ and cl_model_ from cl_ prefix to cl. prefix now that they are part of the per-level state

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5446 d7cf8633-e32d-0410-b094-e92efae38249