fix stupid changes in svn dance, readded changes in parser: unified lookup in resolveName() , dont resolve signal name since thats not a qname, see xsd. fixed formatting in parser

Added NPE check for resource name in class GetDeploymentProcessDiagramCmd and process diagram input stream in class ProcessDiagramLayout.
Added api doc comments in class RepositoryService for methods getProcessDiagram and getProcessDiagramLayout.

ACT-1222: Removed usage of history for test case assertion since hudson has a profile to run without history

Made Bpmn20NamespaceContext extendable to allow usage for own namespaces (e.g. for own extensionElements)

Adding feature toggle in ProcessEngineConfigurationImpl to allow diagram creation on deploy to be disabled.

Possibility to exclude task-related HistoricDetails when using processInstanceId() on historic detail query

Added pool and lanes parsing and rendering on diagram + added missing "drop" statements for new indexes added