Stable version of tmap v1.2

For more convenience, we implement a Graph based on networkx.Graph.
And we also fix some bugs and adjust other function relative to graph (actually we almost change most of the code because it will be used everywhere.)

After we check and implement some test.py, we think we have solved most of the obvious bugs but we also think there are lots of potential errors.

So welcome report any bugs to us.

Stable version of tmap v1.1

Latest version before submitted GB paper.
This version of tmap has been used to analyse FGFP, AGP and EMP data.

Release version 1.0

Init whole project