Forking pycallgraph

[daneads]

pycallgraph has been a useful resource for performance testing my projects, but the PyPi release is far behind. I forked pycallgraph, merged the develop branch, and released pycallgraph2 on PyPi today.

I'll be actively maintaining and updating pycallgraph2 at on my fork if anyone would like to contribute. Namely, it needs stability updates + a wiki.