Add structure check when inserting.
Added script to composite task collections to build sandboxes.
daily validation
support for custom subject
Minor improvements to tests.
Enable journalling in VasptoTaskDrone.
Udpate required version of pymatgen.
Remove simlated dos insert.
iMore error checks in creator.
Fix bug in new error checks.
Use upsert in insertion.
Make queryengine a cached class.
Remove cached class for queryengine.
Add set_collection method.
Changed typo in usage string.
Separate setting of collection and alises.
Do force check only for non-static runs.
fixed creator such that sg.get_spacegroup_symbol() returning non-unicode string
doesn't raise mongo error
Merge branch 'master' of github.com:materialsproject/pymatgen-db