An OG can be associated with multiple MGs
Multiple MGs association finally works
MG can be associated with all OG
OG can be associated only with MGs not in relation with other OG (so
free or in relation with current OG)
Changed the way it is deleted a relation of an MG
Cleaner association code
Association with goal now in different functions
Some proof with junit (not working)
Added "show_sql=false" in hibernate properties file
Changed name of A,B and C functions
Corrected a bug that was causing "sameMGOGRelation" to be always false
Merge branch 'multipleMGs' into entityChange_merge_multipleOgs

Conflicts:
	src/main/java/it/uniroma2/gqm/dao/hibernate/GoalDaoHibernate.java
	src/main/java/it/uniroma2/gqm/model/Goal.java
	src/main/java/it/uniroma2/gqm/webapp/controller/GoalFormController.java
	src/main/resources/hibernate.properties
	src/main/webapp/WEB-INF/pages/goalform.jsp
Corretto bug in isGrandChild
I tag "select" in goalForm e StrategyFormController sono "disabled"
prima di fare la submit, e poi diventano "enabled" per mettere il
passaggio di parametro al controllore
Merge branch 'entityChange_merge_multipleOgs' into entityChange_merge_merge