* moved DataWidth from top axi to Axi4/Axi4Lite objects
* cleaned generators, adopted new naming structure
* implemented generators for arbitrary register files
* master actions improved, simpler constructors
* master actions can be automatically generated from register file
* need to clean up the namespaces etc. - gotten really messy

*  basic tests implemented
*  peekAt/pokeAt do not work; took a lot of time to figure out
*  need to implement a workaround using a serial interface
*  introduces its own problems, *sigh*