Added heart pupil

Added heart pupil

Some minor changes for the 'if' implementation

* Made the conditiion label optional (looks more like an if statement)
* Add basic tests to check that the condition is handled correctly

Added arc eye style

Added hole punch eye style

Added gear pixel style

Added gear pupil, cloudCircle eye/pupil styles

Added a koala-nose style pupil generator

Added basic flame styles for eye and pupil

Added new pixel/eye and pupil styles