Started development on version 0.2.3. Removed unnecessary tracking of triggered nodes.
Node objects are now sortable based on the node name
Added an equality test for Input objects for unit test purposes
Added an equality test for lusmu.vector.Node objects for unit test purposes
Bump version to 0.2.3
Added support for optional development-time node output value type checking
@parameterize test helper now works for test functions without a docstring
Added the mock library to testing requirements
Merge branch 'release-0.2.3' into master

Conflicts:
	setup.py