GWTII-199 added assembly for aggregating javadoc in the documentation modules.
GWTII-199 Assemble javadoc for modules
Merge branch 'GWTII-199-Assemble-javadoc-in-documentation-modules' into integration

Conflicts:
	plugin/editing/pom.xml
	plugin/graphicsediting/pom.xml
	plugin/tilebasedlayer/documentation/pom.xml
	pom.xml
GWTII-693: merge code corrections