changed a lot of Con_DPrint/Con_DPrintf calls to Con_Print/Con_Printf (non-technical...

changed a lot of Con_DPrint/Con_DPrintf calls to Con_Print/Con_Printf (non-technical things like device errors which should be seen even without developer on)
merged Sys_Print code into Con_Print and changed all other Sys_Print/Sys_Printf calls to calling Con_Print/Con_Printf or Con_DPrint/Con_DPrintf instead
rewrote Con_Print so that timestamps are printed only at the start of each line (or just after the 0x01 or 0x02 characters used for chat messages), not during partial line prints, and timestamps now apply to all output destinations (log, console, terminal)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@4816 d7cf8633-e32d-0410-b094-e92efae38249