Added more test-files to .npmignore.
Added some tests and fixed some issues.
Replaced glob-whatev with glob.
Added a test for the clean-functionality.

Cleaned the tests a bit.
Clean-only for folders.
Updated the `generateOutputName()` function to use the input-file dir for the new file.
Added support for the `clean` option for single file jobs.
Updated readme.md to reflect the new `generateOutputName()` behaviour.
Updated `generateOutputName()` to enforce the path of the output file.
Added tests for previously untested functionality, and fixed some bugs on that account.
Merge branch 'master' into _clean-only
Added `cleanOnly` functionality to single-file runs.
Updated command-line interface to expose `cleanOnly` option.
Updated readme to cover `cleanOnly` option.
Added a `cleanOnly` option.