small layout fix for treeView component, substituted tabs with spaces in cycle javascript files, added null checks for history event based tree node highlighting

added artifact-link.post webscript to REST API and updated documentation and license statement in the cycle REST API

Also improve the factory to register the created ProcessEngine in the ProcessEngines class

Eclipse settings where removed from SVN which made source-level 1.6 again and introduced illegal @override annotations in my new code

ACT-125 added event listener + made java serviceTask use shared instance of delegate class + field injection altered

added new RenderInfo value 'HTML_REFERENCE' for contentRepresentations that just provide a reference URL instead of the actual HTML content, updated UI and REST-API accordingly

refactored cycle API, made CycleService the central API, added connectorId to all methods in cycle service, got rid of root connector, seperated persistence into several services with interfaces and impl package, refactored GUI according to changes, removed some obsolete files and classes

Added new attribute in CycleLink entity.

Refactored Artifact.ID, now we have 'connectorId', 'originalNodeId', 'currentPath' and 'globalUniqueId'
Added ID for repositoryConnectorConfigurations
Fixed bug in Signavio Connector to let it fail in log level FINE
Added missing httpclient jars to web-app in demo setup (caused by new restlet version)

added tree images and modified css so the images aren't loaded from developer.yahoo.com anymore, modified loading gif in tree, renamed tree.get webscript to child-nodes.get and refactored GUI accordingly, small layout fix in content representation view