eval_str handles date(time)s well
bcolz selection defaults to python on AttributeError
Fixing file merge conflicts.
into: Iterator <- bcolz
python: datetime selection
bcolz selection python branch uses into rather than iter

This coerces types properly
deal with into conflicts and bcolz
fix eval_str doctest
separate selection functions for carray, ctable
Merge branch 'master' into nyctaxi-bcolz-fixes

Conflicts:
	blaze/compute/bcolz.py
Merge remote-tracking branch 'upstream/master'
Makefile now creates directories needed for capabilities.py
first pass at lean projections
Changes to tests, removing coverage on one line in compute/numpy.py
Cleaned up test_compute_up_projection and field.
lean optimize summary and by-of-summary
docstring for _lean
lean optimize on sort
_lean(Symbol) doesn't project if not necessary

Thanks @mwiebe for bringing this up
sort __str__