Release 3.0.1

## Release date: 13 May 2014

This is mainly a maintenance and development environment improvement release.

Thanks to all contributors and to everyone who reported issues and provided feedback about DbFit.
Thanks to [Jake Benilov](https://github.com/benilovj) for carefully reviewing all pull requests and for opening up know-how about the release process to enable releasing DbFit more frequently.

### Minor improvements and bugfixes

* Let undefined symbols default to NULL ([#300](https://github.com/dbfit/dbfit/pull/300))
* Explicitly close database statements when done with them ([#291](https://github.com/dbfit/dbfit/pull/291))

### Documentation improvements

* Update driver name in configuration instructions for Db2 ([#296](https://github.com/dbfit/dbfit/pull/296))

### Development and project improvements

* DB2 installer for dev/test VM ([#286](https://github.com/dbfit/dbfit/pull/286)). Thanks to [Mark Matten](https://github.com/MMatten) for contributing this.