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Formatting
Require Rails 3.x in gemspec instead of raising
Remove overly-restrictive rspec-rails requirement
Make rspec an explicit dev dependency
Convert README to markdown and cleanup
Require Rails 3.1
Require Rails 3.2
More modern Rakefile
It's 2014
Remove unused file
Subclass StandardError, not Exception
No need for absolute-path require of spec_helper
Spelling/grammar
Remove unneccessary platform specification
s -> spec
More modern gemspec
Freeze constants