Modified Master to Include FAST-TCP

Added code to implement FAST TCP, including in some cases
    changing existing methods to dispatch to submethods
    depending on which version of TCP Congestion Control
    is being used.

Due to interactive graphing not working on my terminal, I
    can't really verify this works personally.  I know
    it compiles and runs, but if the results are nonsense
    we'll just have to push a reversion or fix.