Nice and mean messages, reorganized game

Added variables and methods to handled nice and mean messages in
Prisoner, and added methods and moved around the flow of Game to
accomodate using the messages
Changed initialization to include name and messages

The initialization of prisoners now includes setting the name and
message of each prisoner, so all the prisoners will need to have this
added eventually
Merge pull request #18 from fkummer/Action-Messages

Action messages