Danker

* Improved cli
* Better error checks
* Added support for other wiki projects that link to Wikidata

Testing Travis PyPI integration

* Moved standalone/library parts into separate readme.
* Improved project structure.

* Integrated with readthedocs
* Integrated with Travis CI
* Improved documentation
* Cleaned up sorts

* Added `script/maria2csv.py` for converting MySQL/MariaDB dumps to CSV format.
* Major rework of `script/createlinks.sh` script: Switched from column-number-based access to column-name-based access (this now includes Wikis that have a different DB layout, i.e. columns are not in the standard order).
* Removed second dictionary from `danker/danker.py` by altering `i` and `i+1` PageRank score positions with iterations in a single dictionary.

* Moved scripts to own folder `script`.
* Renamed `lib` folder to `danker`.
* Added `setup.py`.