Add link to during from between
Typo fix. Closes #398
Merge branch 'issue-398-between-during'
Added NoBrainer tutorial

Quickstart guide for getting up and running with Rails and Rethink.
Some aspects of the tutorial rely on behavior from a pending PR in the nviennot/nobrainer repository. If those aren't merged this tutorial can be modified easily to work around the missing functionality.
Updated NoBrainer guide based on feedback