expr: use datashapes in arithmetic, not strings
distinct doesn't assume same shape as child
setup.py doesn't depend on toolz
Merge branch 'master' of github.com:ContinuumIO/blaze
simplify binstar.yml, add windows support
remove doc test from conda recipe test
Merge pull request #808 from mrocklin/binstar

Simplify Binstar script
update binstar.yml to force blaze channel
Add length expression
Add NRows expression
Implement NRows for different backends
Clean up star imports
Move to reductions
Rename NRows -> nrows
Use None instead of {}
Import cleanup
Move to reductions
Axis is already there
Make nrows a property on tabular things
Use nelements() and nrows property