* Migrate to semantic versioning
* Ability to install dev requirements after installing original requirements
done without errors
* Fix support of ancient pip versions
* Provide docstrings to internal bootstrapper functions
* Discount support of ``bootstrapper-X.Y`` scripts
* Change preferable method of running script from ``bootstrapper`` to
``python -m bootstrapper``
* Move documentation to [Read the Docs](http://bootstrapper.readthedocs.org/)