refactoring, added basic entity model
refactoring, added HandlungsfeldModel.java initial
added handlungsfeld and item services and jacoco
unit test added and bugfix
added windows default encoding
method invocation
added TreeView
experimental contextmenue binding
added layout
Bugfixing Handlungsfelder
Added filterItem
Added moveItems
Merge branch 'develop' of https://github.com/hauntedhill/SE-CAT into develop

Conflicts:
	src/main/java/de/hscoburg/evelin/secat/controller/HandlungsfeldController.java
fix
added dynamic fxml loading
added findById for item and handlungsfeld
added error handling for application loading
added icons to context menu
fix fxml case issue
added eigenschaften und perspektiven pflege, icons ....
fix test issues
fix handlunsgfeld select, comment id generation