allow to select frontend via command-line; add a GUI-less frontend for scripted actions
-rw-r--r-- 6 .gitignore
-rw-r--r-- 17988 COPYING
-rwxr-xr-x 10069 dsl.py
-rw-r--r-- 3442 gui.py
-rw-r--r-- 4244 qt_dialogue.py
-rw-r--r-- 2068 zenity_dialogue.py