Tab completion

[CendioOssman]

Is your feature request related to a problem? Please describe.
Using the different commands from the command line can be a bit annoying if you want to do complex things, as you need to remember the exact name of all options and you have to spend time to type them out. Mainly this is for the viewer and the servers, which have many options.

Describe the solution you'd like
I'd like to be able to use the shell's tab completion function to suggest parameters (and possibly servers).

Describe alternatives you've considered
No good alternatives come to mind.