Merge pull request #5 from johannhof/master

Optimizations/Code cleanup
use _ if variable isn't used in matched block
Implemented proper cli behaviour

The user is now able to specify the source and destination directory.
Merge pull request #6 from cobalt-org/benny

Code cleanup
user specified destination dir is used as direct build dir
Merge pull request #7 from cobalt-org/destination_source_cli

Implemented proper cli behaviour
Refactor, copy files (fixes #1)