Node description added.
removed tests of private methods
User stories added.
added user-story test classification
Merge branch 'dev' of https://github.com/adudek/ic-depress into dev

Conflicts:
	ic-depress-data-anonymisation/src/org/impressivecode/depress/data/anonymisation/AnonymisationNodeModelTest.java
added class AnonymisationFileChooser;
Implemented ClickEvent on button "Add new and load";
Added new Constant - KEY_LENGTH = 128;