Random riders

[MrRacoon]

Opening this request to begin the talk about the random rider mechanism.

This pull request will update and merge changes that will provide random riding around of riders

I believe that this still needs to be worked on further:

• Should keep track of current leg of the journey
• only read in one file at a time to preserve memory for the DB
• Corner case checking to ensure that a rider tries another station if there is no room to check the bike back in.

I am open for more comments

[MrRacoon]

Still todo

• [x] Error checking for riders that try to Check(In|Out) bikes to empty Stations.
• [x] Save Route data one file at a time rather than all at once.
• [x] Keep track of the last station visited as riders ride, to make deviations easier.

[MrRacoon]

If Someone could test this and merge it I think this would be a good start for testing the visuals. I'm going to need another day to hash out the error checking with the Check(In|Out) bikes to empty Stations goal.

EDIT Hold the phone I almost have this done...

[MrRacoon]

Woot, Goals finished. This should be adequate for fun visualizationing.

[cgiossi]

As we discussed, you're gonna change the error cases to throw exceptions, and clean up the callback classes

[MrRacoon]

@cliffyg Hey if you could review this and make sure it looks god, I followed through with the changes we discussed. Let me know if there is anything else I missed, or could be added. Otherwise, I would say this is merge ready.