Generation number added to Thrift message.
Generation number aded to thrift protocol.
Gen# added to thrift. Haulover of evaluator (unfinished).

Evaluator was changed to work using the classes in the Evo4MAS project as
much as possible, for maximal comparability and the possibility to include
grid evaluation using JPPF.

Plan of action:
1) Fix the local evaluator (might take a while)
2) Implement the JPPF evaluator (should be very fast)