Howdy!

Great gem, but boy was it frustrating to figure out how to use it. The sub-readme files are confusing, and some of the documentation is just out of date.

This set of changes cleans things up. I've removed links to https://github.com/jodosha/redis-store/wiki/Frameworks-Configuration, which I recommend be removed. It is out of date and confusing. Everything it covers should be covered in the readmes now.

• Move build status to the top of the main readme.
• Move to two-space tabs, like most of the Rails community.
• Drop redis installation instructions from every readme.
• Correct the build instructions. Install before exec.
• Refer users to redis-rails from the individual gems.
• Update the redis-rails readme to be more up-to-date.
• Use Ruby 1.9 conventions for code samples.