- update dependency versions

Use one file per class. Also, use boost::core::demangle instead of
checking for abi::__cxa_demangle by ourselves.

We have a visitor now for generating
 - the XML
 - the Module's dot graph
 - the textual dump of the VariableNetwork
 - the dot graph of the VariableNetwork

Fixed tests which were broken after updating the demoApp due to changed map files. Now the tests have their independent map files.

removed the boost libraries from the test since linking against the boost unit test library leads to crashes on newer gcc/boost versions