now caches the existence of each backend in a dictionary, no longer any need to look...
tree1a9d7d174d9d72c670c3c6c6f41a42c46d520ff0
-rw-r--r-- 4118 command_executer.py
-rw-r--r-- 7436 commands.py
-rw-r--r-- 1280 commands.xml
-rw-r--r-- 7331 gui.py
-rw-r--r-- 1056 main.py
-rw-r--r-- 9171 mainwin.glade
-rw-r--r-- 1470 progresswin.glade