Test case 1 working with FAST TCP

The link capacities defined in the test cases were 8x too high, I
erroneously assumed they were given in MBps, not Mbps.  Once that was
fixed, FAST TCP turned out to be working, although the alpha value I was
using was too large (by about 25%).  Monitoring of transmission rates
still needs to be fixed, as it currently displays data much too densely.
Merge branch 'graphing' of github.com:WalkerMills/network_simulator into graphing