* 0.1.5 - Fix to install instructions
* 0.2.0 - Refactored internal node implementation
* 0.2.1 - Updated examples code
* 0.2.2 - More examples code
* 0.3.0 - Added support for 'key in trie'
* 0.3.1 - Typo correction for example 7
* 0.3.2 - Updated installation instructions
* 0.3.3 - Fix to readthedocs usage page