Make it clear that each profile group must be prefixed with "profile"
Small change in wording for profiles
Merge branch 'k4ml-fix-readme-profile-prefix' into develop

* k4ml-fix-readme-profile-prefix:
  Small change in wording for profiles
  Make it clear that each profile group must be prefixed with "profile"
Add bugfix for unpacking scalar long value

Should be the same as an integer type.
Fix bug when empty value for list param is specified

This happens when someone runs::

    $ aws someservice --list-param ""

Now we handle this case gracefully.
Fixes #163.