GH278 - Performance upgrade: single update for node removal and
undo/redo
GH278 - Set more node properties at once
Merge remote-tracking branch 'origin/master' into
GH278-undo-redo-command-stack

Conflicts:
	org.flowerplatform.core/src/org/flowerplatform/core/node/resource/ResourceSetService.java
	org.flowerplatform.core/src/org/flowerplatform/core/node/update/controller/UpdateController.java
	org.flowerplatform.tests/src/org/flowerplatform/tests/controllers/FileSystemControllersTest.java
Merge pull request #518 from flower-platform/GH278-undo-redo-command-stack

GH278 undo redo command stack