Added completion to profiles

[padilo]

Adds autocompletion to profiles

[simcap]

Thanks!

For this one @padilo , if a file does not exists (ex: ~/.aws/config .... not everybody has this file present unfortunately) the completion will throw out an error.

Before we merge this one the bash script should handle grep on non existing file (i.e. file exists check beforehand).

Good job! Will be very useful.

[padilo]

Cool, I'll improve that ;)

[padilo]

@simcap, should be solved now. Also rebased on top of master

[simcap]

Thanks @padilo . Merged.