fix renaming a list of HDFS files to a single dest
Add support for redshift.

Create a common class for redshift and postgres (since they are similar).
In the future postres should more to contrib as well.
Create both a Redshift target and an S3CopyTask
Support for AutoConfigClient from snakebite.client
Use postgres as the Target for both Redshift and Postgres (only add an attribute use_db_timestamps). And rename postgreslike to rdbms
Adds upstream dependencies option to visualizer

Uses new api call /api/inverse_dep_graph/<task_id>, which returns
the same data types as  /api/dep_graph, except the "deps" field
is inverted.

E.g. If A requires B, the data returned is
{
  "B()": {
     deps: ["A()"]
  }
}
Add test, fixes from test

Inverse dependency wasn't being added if we'd already seen it
- fix serialization of DataHourParameter when the value is None
Merge pull request #293 from JonNelson/fix_date_hour_param

- fix serialization of DataHourParameter when the value is None
Merge pull request #276 from rantav/redshift

Add support for redshift.
Merge pull request #288 from JoeEnnever/upstream

Adds upstream dependencies option to visualizer
Merge pull request #284 from kawaa/autoconfig-snakebite

Support for AutoConfigClient from snakebite.client
have the track process return (stdout, stderr), bubble this up to the
hive module as well
Merge pull request #295 from p5k6/return_stdout_stderr

have the track process return (stdout, stderr) tuple
Add package-level docstrings for sphinx docs
warn that multiple renames is not atomic
Fix RST syntax in docstrings.
Switch to sphinx RTD theme.

Conditionally add the sphinx RTD theme if we're not on RTD.
Properly wordwrap the sphinx README.md
Add sphinx-apidoc generated autosummary docs

Document stubs provide documentation for the entire project.
Merge pull request #297 from jcrobak/sphinx-improvements

sphinx documentation improvements