don't spew cvar settings
just insert cvars at the head of the list
revert 99fd6e1277d43a760e0fa39740ce27a4ccb1e821, just make sure mode is set before font init
avoid gratuitous mode changes
less opengl spew
add function to find a cvar by name
cvar autocompletion
command and alias autocompletion
implement cvar_write
WriteConfigFile now calls cvar_write, which writes all archive cvars out to file.
also reverted 92d03c622f9af6dc01e8991289c813a66e3f2df2 and integrated find and assertion of cvar non-existence
set cvar values via formatted string. convenient macro for setint
add cvar_toggle