Refactor ProductSchema to use Observed directly
Use model instead of init in test_runner.test_generate
Only test datasets with probably at least one observation per column
Add wheel support.
Fix bug in test_query.get_example_requests
Make unit tests cheaper to run
Add more expensive big-test and bigger-test make targets
Merge pull request #25 from priorknowledge/sparse-value

Implement sparse ProductValue
Bump to version 0.1.1
Merge pull request #27 from priorknowledge/wheels

Add wheel support.
Merge branch 'master' into sparsify
Fix schema to use new normalized_*() functions