Enable floating numbers for data collection interval
Upload preliminary implementation slides
Merge pull request #26 from kexinrong/newFlow

Implemented Go-Back-N protocol for flows.
[Output] Change index of plotting label
Merge branch 'master' of github.com:kexinrong/NetworkSimulator
[Output] Change plotting labels index
[Output] Add plot for window size; add argument for plotting specific links
Merge branch 'master' of github.com:kexinrong/NetworkSimulator into HEAD

Conflicts:
	output.py
Implemented FAST TCP
- FLow now runs FAST + Go-Back-N
- Changed reporting for window size so that report only starts after flow starts
- Using static alpha for now