now when we do make, it compiles py files to pyo and make install install pyo files instead of py files

gajim.sh --> gajim.py, adding psyco support if available, small fix in new message dialog if @ is not given

ImageCellRenderer has now better name, gajim.py --> gajim.sh [needs fix to makefile to make it work, padding and xalign trying to clean up (don't work yet). added a fixme in new message dialog about focus problems..

Gajim is launched throught a bash script that check if we are not root

- no need to store .mo files : they are now created by make