add into(DataFrame, pytables Table)
fix h5py/pytables import interactions
convert test to use pytest fixtures
use importorskip in fixture as idiom for skipping single test
Merge branch 'master' of github.com:ContinuumIO/blaze into into_pytables_df

Conflicts:
	blaze/api/tests/test_into.py
use consistent technique to skip tests based on import behavior
comprehensive compute tests
mongo: distinct
add pymongo to comprehensive compute test
a few additions to compute test_comprehensive
Merge pull request #455 from talumbau/into_pytables_df

add into(DataFrame, pytables Table)
Merge branch 'master' into compute-comprehensive
expr: Summary
expr: summary hashable and eval(str(.)) able
python: Summary compute
scalar: name, dtype properties
expr: Reductions support Number interface
compute: python arithmetic
python: summary by
pandas: summary by tests
pandas: summary by