[403659] Better handling of non-existent features in label expressions
[398827] Preliminary validation support for viewers annotations
[404839] improved Rete visualizer: removed memorynullindexers and delta
monitors; added size display for memory identity indexers
[404839] move Rete Visualizer activation into separate command and menu
item
[398827] add menu contribution support for Viewers tabs; add most
important menu items to the Zest tab.
Added more precise generics parameters to MatcherFactoryRegistry
[398827] add clear support for Viewers
Merge branch 'master' of ssh://irathyxf@git.eclipse.org/gitroot/incquery/org.eclipse.incquery.git
[404839] - some cleanup
observable match list and set now supports initialization by matcher
removed obsolete ElementChangeNotifierNode & PredicateEvaluatorNode
added method Indexer.getListeners() for better reflection
[404839] make null and identity indexers appear only on demand; add
further text display tweaks
[398807] added warning for not representable features in path
expressions
moot equality PConstraints are less promiscous now during layout
[398807] fixed existing and added new test case for not representable
features in path expressions
[398744] created initial interface for engine lifecycle
[398807] Sonar warning fixed
[NONE] Enforcing UTF-8 encoding in Rete project
[405962] Fixed a memory leak in Query Explorer