Cat readme into setup.py long description

[nvkelso]

Like we do here for tilequeue:

• https://github.com/tilezen/tilequeue/blob/master/setup.py#L12
• long_description=open('README.md').read(),

[nvkelso]

Also take a pass for all metadata and description (match to PyPi).

[nvkelso]

Like:

Development Status :: 5 - Production/Stable

[nvkelso]

Update keywords:

keywords='was queue s3 sqs tile map',

And those should generally match the topics from Github (which we should add to all repos).

[nvkelso]

Use http://pandoc.org to convert Markdown to RST for better description