Synonyms for submodules

[glennmatthews]

Would be nice to provide various synonyms for the built-in submodules to make the CLI more intuitive/discoverable. Some possibilities:

cot info --> cot describe
cot edit-hardware --> cot hw, cot hw-edit
cot inject-config --> cot set-bootstrap

Etc.

[glennmatthews]

This could probably be done by calling add_parser() multiple times for each submodule - however the args for each subparser would need to be added each time as well unless we want to use a shared "parent parser" - however, see http://stackoverflow.com/questions/7498595/python-argparse-add-argument-to-multiple-subparsers.

[glennmatthews]

Easier than that - add_parser() takes an aliases parameter:

checkout = subparsers.add_parser('checkout', aliases=['co'])

[glennmatthews]

...but only in 3.2 or later, not 2.7: http://bugs.python.org/issue13879