Application - Add short aliases for commands

Note: The goal is to make it easier to type quickly. I experimented with
setting the default command to "status", but this seems like a clearer way
to achieve the same end.
StatusCommand - Tweak output
Rename "boring" to "git-scan"
Rename files ("Boring" => "GitScan")
Rename classes ("Boring" => "GitScan")
composer.lock - Add file