Bump rspec-rails to 2.14.0
Remove simple_format from formatting_helper

This was causing more trouble than it's worth, and besides the formatters for Textile + Markdown already add in the paragraphs, so there's no point using simple_format if the formatters are supposed to do it anyway
Mention the fact that Devise does not provide 'name' column by default (partially fixes #495)

Fixes #498
Merge pull request #1 from radar/master

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