#24 - doc and small improvements
#60 - code review modifications
#61 - Merge remote-tracking branch 'origin/GH60-node-limits-review' into
GH61-icons

Conflicts:
	org.flowerplatform.freeplane/src/org/flowerplatform/freeplane/controller/MindMapBasicPropertiesProvider.java
	org.flowerplatform.freeplane/src/org/flowerplatform/freeplane/controller/MindMapBasicPropertySetter.java
GH61 - solved issue at remove all