Refactored settings and related stuff
Nuked the theme section in defaultconfig
Refactoring terminal with signals instead of callbacks

Also changed the different on/maybe/off and always/needed/never options
for the vertical scrollbar (in the terminal vs in the config) to be
on/auto/off for both.
I accidentally new_and_empty(), fixd nao
Added ? option to togglecmds to view value
Changed cmd_new_window into a togglecmd
Moved quit/new/save/open cmds to kalpana.py