* Menu entries for debugging

# Conflicts:
#	rt/src/main/java/edu/kit/iti/formal/psdbg/interpreter/dbg/Breakpoint.java
#	ui/src/main/java/edu/kit/iti/formal/psdbg/gui/controller/DebuggerMain.java
#	ui/src/main/java/edu/kit/iti/formal/psdbg/gui/controls/ProofTree.java

Everything new! Everything Better Now!!

See merge request !4

Bugfix: matching expressions over state variables was not working; two minor issues fiexd because it did not compile

* fixes of NPE
* connect UI to DebuggerFramework
* add frames combobox and context analysis
  * including bugs

Now, testing the big things!

# Conflicts:
#	rt/src/main/java/edu/kit/iti/formal/psdbg/interpreter/graphs/ControlFlowVisitor.java
#	rt/src/main/java/edu/kit/iti/formal/psdbg/interpreter/graphs/PTreeNode.java
#	rt/src/main/java/edu/kit/iti/formal/psdbg/interpreter/graphs/StateGraphWrapper.java
#	ui/src/main/java/edu/kit/iti/formal/psdbg/gui/controller/ProofTreeController.java