LOW/ Cllean up, improvment and tests.

Excel Connector : 
	- some FIBs doesn't pass validator. 
Archetypes: 
	- Gitignore added
Freeplane :
	- Validate FIB
	- Add edition action (childnode)
Merge branch '1.7.0' of git@github.com:openflexo-team/openflexo-technology-adapters.git into 1.7.0