Command alias or Alias command #1091

Command alias or Alias command #1091

Dearest Reviewer,

This pull request closes #1091 which is a request to support aliases.
This is not as powerful as something like git's alias, however, I think
it sticks true to the original request.

I high jack the processing of the args. After a few flags are checked
and the args are parsed I check the config file for alias.COMMAND. If it
is there I split it like args does and replace args[1] (the original
command) with the alias command and its 'flags'.

I have also included default short hand commands b, t and r.

Thanks!
Becker