* Fixed predicates filtering onto RequirementView.
 * Enhanced Predicates Editor in order to show only the display name of
   custom predicates instead of their whole contents.
 * Updated DataModel RequirementSource/RequirementSourceImpl in order to
   retrieve the complete set of EClass of the targetEPackage.
 * Enhanced drag & drop done onto the Predicates Editor.
 * Enhancements added to the LabelProvider of the Predicates Editor in
order to show, by default, only the display name of custom predicates
and not their full contents.
 * Modified the context menu of the Predicates Editor so that it does
not show the "create child" and "create sibling" menus when the selected
predicate is a custom (saved) one.
 * Added a new checkbox button allowing whether or not to expand the
contents of custom predicates.
 * Now it is possible to selected multiple RequirementSource
(repositories) while opening the Predicates Editor.
 * Merged org.eclipse.reqcycle.repository.data
Conflicts:
	plugins/org.eclipse.reqcycle.repository.ui/src/org/eclipse/reqcycle/repository/ui/providers/RequirementContentProvider.java
	(Took remote file version, but updated the method getTargetEPackage()
with the local version)
 * Updaded the getETargetPackage() method signature in RequirementSource
and RequirementSourceImpl classes.
 * Fixed import in OpenFilteredRequirementViewAction.java
 *Added 2 actions in RequirementView (choose/modify predicate filters to
apply , and choose/modify RequirementSource to use)
 * Fixed DummyContentProvider
 * Enhanced Predicates configuration manager.
Merged differences in org.eclipse.reqcycle.repository.[data,ui]
Merge branch 'master' of https://github.com/aradouan/ReqCycle.git

Conflicts:
	plugins/org.eclipse.reqcycle.repository.connector.rmf/src/org/eclipse/reqcycle/repository/connector/rmf/RMFConnector.java
	plugins/org.eclipse.reqcycle.repository.data/src-gen/DataModel/RequirementSource.java
	plugins/org.eclipse.reqcycle.repository.data/src-gen/DataModel/impl/RequirementSourceImpl.java
	plugins/org.eclipse.reqcycle.repository.data/src/org/eclipse/reqcycle/repository/data/IDataTypeManager.java
	plugins/org.eclipse.reqcycle.repository.data/src/org/eclipse/reqcycle/repository/data/impl/DataTypeManagerImpl.java