Add write and quit commands
Add write and quit commands

This adds following vim-style commands to the command mode:

* write
* w
* quit
* q
* wq

Commands can be suffixed with a "!" to force execution.

Signed-off-by: Lukas Fleischer <af90e31281d8305af43dc616c5aaca3c7165f8a7@cryptocrack.de>

lfos/calcurse,lfos/calcurse,lfos/calcurse