Allow tests to tolerate new default column encodings in Redshift

[jklukas]

In order to get a new release out the door, we need to get tests passing.

Looks like Redshift changed the behavior for default encodings. Previously, all columns were RAW by default. Now, encoding is chosen per column type as discussed in http://docs.aws.amazon.com/redshift/latest/dg/c_Compression_encodings.html

I'll be pushing changes to this branch as I work.

Todos

• MIT compatible
• Tests
• Documentation
• Updated CHANGES.rst

[jklukas]

Tests are now passing locally and I'm removing the WIP label. This is ready for review.

[jklukas]

cc @ericness who was interested in getting recent changes released, which will rely on this.

[graingert]

@jklukas what's your PyPI username?

[jklukas]

I'm Jeff.Klukas on pypi.

[jklukas]

@graingert - Have you gotten a chance to add me on PyPI? It would be good for me to have the chance to do a release and make sure I understand the steps. I'd plan to document those as well as I go through.

[graingert]

@jklukas I mostly just do

# ~/.pypirc
[zest.releaser]
create-wheels = yes

vim HISTORY.rst
python3.6 -m venv ~/.virtualenvs/dist
workon dist
pip install -U pip setuptools wheel
pip install -U tox zest.releaser
fullrelease  # follow prompts, use semver ish with versions.

[jklukas]

I just performed a release. Releaser is amazing. Version 0.6.0 is on PyPI.