Log Message:
Update to 0.5.3

changes:
0.5.3
 - change from "LUKAS MAI" to "THE COPYRIGHT HOLDERS" in \ 
LICENSE description

0.5.2
 - split code into separate class/instances packages

0.5.1
 - add GNU Makefile with convenience targets
 - test 7-tuple instance
 - Merge pull request #3 from jaspervdj/master
     Add Default instances for 6- and 7-tuples