Adapt adanet_wrap.py to Python3

I manage to run your adanet implementation in Python3 =)

The only thing is that log.info raises and error when printing "activation" (line 348) and "subnetwork_generator" (line 353-354) from /package/chemicalchecker/tool/adanet/adanet_wrap.py. Just commenting those lines is enough but may be they could be adapted for python3 :·)