Complete UnitTest class

Squashed commits:
*Add missing sequential unit tests
*Remove unused units from .henshin file
*Add ConditialUnit tests
*Add PriorityUnit tests
*Add IndependentUnit tests
*Add LoopUnit tests
*Describe test scheme in html and javadoc
*Improve nonstrict SequentialUnit test

Signed-off-by: Benjamin Heidelmeier <heidelme@students.uni-marburg.de>
5 files changed