Feature: Expand aliases

[frippe75]

Could be nice to have an option whether or not to auto expand aliases.
To save time I usually put an alias for openstack as "o" which means my history looks like
o server list
o stack list

and so on...

Sometimes I'm sloppy and don't setup my aliases everywhere. So then
o server list doesn't really mean something.

Think autoexpanding would make sense as a default but I only gave that thought about 10 sec :-)

[rcaloras]

@frippe75 thanks for suggesting. This would be easy to implement if there was a function to programatically expand aliases in a string. Basically like alias-expand-line except accessible from a bash script or python. It's referenced a bit here:

http://superuser.com/questions/247770/how-to-expand-aliases-inline-in-bash
http://stackoverflow.com/questions/14180906/programmatically-dereference-resolve-aliases-in-bash

If you can find a reliable way to do it, I'll help with the PR 👍