ubuntu-builder should have --help and --verbose command line switches

[sdaau]

Thanks for the great software!

I'm just trying ubuntu-builder with 12.04 mini distribution; all went fine, but when I click on "Try", nothing happens.

Since I run ubuntu-builder from the command line, after I exit ubuntu-builder, I can see "qemu: invalid ram size: -cdrom".

I tried to run `ubuntu-builder --help` from the command line, to see what is the actual `qemu` command line being called - unfortunately, nothing happens, and the ubuntu-builder GUI starts as usual.

Now, I just with there was a command-line:

* --help switch - which will just show the --help and --verbose options, and note that otherwise the program starts in GUI mode
* --verbose switch - where the program will dump to terminal stdout (if started from terminal, of course) the command line that it executes upon clicking on various buttons, such as Try.

That would facilitate easier debugging as in my case (so I don't have to do gdb or other methods)

Thanks for considering this,
Cheers!