[GH-38] Moves accounts desc to 'first' file

The accept invite subcommand is now alphabetically before the
default subcommand so the help was not being detected.
[GH-38] Sorts commands before we require them

This does a sort to ensure when we require a command the ordering
is consistent so the first ommand encountered should have the
help so it is correctly setup by GLI2.
Merge pull request #39 from brightbox/38_help_descriptions

[GH-38] Fixes loading of command help