adds into(pytables Table, csv) through pd.read_csv
adds multi-method dispatched resource function
into(DataFrame, tables.Table) goes through dynd for proper string
conversion
generalize so that into(object, str) hits resource first
resource(str) returns CSV
skip tests on lack of pytables
propogate pandas.read_csv keyword args through CSV
expr: merge on repeated columns raises error
dplyr: transform overwrites repeated columns
expr: fix merge overlapping columns error
expr: eval_str works on unicode literals
replace some instances of str with _strtypes or unicode
expr: Map.label short-circuits old map
Merge pull request #512 from mrocklin/merge-repeated-columns

Merge repeated columns
Merge pull request #515 from mrocklin/str-lingering

Str lingering
Merge branch 'master' of github.com:ContinuumIO/blaze
Test relabel on Series objects
Implement relabel compute on Series and clean up a bit
Test map with rename
simplify into(tables.Table, path)

- use HDFStore from pandas for DataFrame -> Table
- don't require existing pytables Table
hold extra keyword args in 'extra_kwargs'
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
Test failing on renaming a series with multiple names fails