Merge pull request #1 from rakhimov/master

Initial query from Robert's cyan
Merge pull request #9 from rakhimov/master

Fake decay const added
Merge pull request #10 from rakhimov/master

Modifications of query.py and introduction of a better decay dummies
Adding a query file for waste metrics (does not yet work)
updated query on waste mass wrt isotope
Adding activities file
Updated column names to reflect most recent db changes in cyclus; added a function to allow a waste inquiry at arbitrary time steps
Added some activity queries for review
Merge pull request #11 from rakhimov/master

PyNE
have working version of actvity
Merge pull request #13 from scopatz/master

have working version of actvity