expr: add path-split function
expr: Split function to chunk expressions
expr: split distinct operations, fix split
summary string printing
expr: split on summaries
wip: split expr on by, expose error on summary
expr: ensure that summary.child is not a reduction
expr: summary child must be tableexpr
ensure that path-split on summary of one reduction returns summary
py26: remove dict comprehensions
nice import error around impyla installation
Remove traces of unicodecsv
fix sql distinct
scalar_coerce('?int', 0) is 0, not None
Merge pull request #649 from cpcloud/doc-fixes

Remove traces of unicodecsv
Merge pull request #650 from mrocklin/sql-distinct

More sql fixes
split on embarassing computations
fix conda build on windows and adding in calls to build and upload pkg for jenkins jobs
upading binstar and trying to debug with echo stmnts
more debugging statement