Start on SQL backend
Greedy backend partitioning pass
Work on establishing execution strategy in AIR
Some cleanup and docstrings
Some more work on execution strategies in AIR
Leverage single backend annotation in jit pass
Transform python kernels to pykernel
Work on merging changes from master
Get a bit closer to making this partitioning thing work
Update some sql ufuncs and tests
Improve error messages, disable sanity check for now (TODO: fix ufunc function/implementation signature discrepancy?)
Fix some style and import issues
Merge pull request #133 from markflorisson88/sql

Backend generalization and gentle start on sql backend