v0.2.1, 2014-10-30 -- Bug Fix: PERFECT and PASSIVE now working.
	The PERFECT and PASSIVE features are now being passed correctly to the realiser.
	Tests have been added to show functionality.

v0.2.0, 2014-10-27 -- API Change: Expressing features
	Features no longer need to be nested in lists, instead use a single dictionary.
	Several other minor features added.

v0.1.0, 2014-10-09 -- Initial Release
