expr: Map.label short-circuits old map
Merge branch 'master' of github.com:ContinuumIO/blaze
expr: Expr.project used to simplify graphs

Classes like Column, Project, Merge can all project more intelligently
than by just wrapping around another Projection.
expr: py3 import unicode from compatibility
expr: merge.project(list-of-columns) fixed and tested
Merge branch 'master' of github.com:ContinuumIO/blaze
into: list <- numpy - better datetime handling

Nanosecond datetimes converted to datetime objects, not Longs
into: DataFrame <- CSV support datetimes with parse_dates
into: exhaustive test - add datetime support
into: exhaustive test with basic compute
into: exhaustive test - refactor data sources
into exhaustive: remove csv from base targets
mongo: tests skip if no mongo server running
python 3 compatibility
into: exclude into(nd.array, *) test with datetimes
Merge pull request #516 from mrocklin/expr-project

Small optimizations to expressions
changing mysql cmd to hand local vs remote data -- see https://github.com/travis-ci/travis-ci/issues/2693 for more details on use of `LOCAL`.  Also changed default lineterminator to '\r\n'.  New lineterminator works for both Postgres and MySQL and will more effectively handle data on Windows machines while still working seamlessly for txt files generated on OSX/Linux
Merge pull request #497 from mrocklin/into-persistent-test

Continue to test and improve `into`
Merge pull request #524 from quasiben/fix/mysql_ci_testing

Fixes MySQL TravisCI testing