Rake is a development dependency
Remove unneeded development dependencies
Require newer with_model
Remove no longer needed backport
Whitespace
Fix incorrect described class
Don't use deprecated autoload; require only as needed
Move exceptions to their own file
Remove .rspec
Don't specify actual class when not used in spec
More modern Rakefile
It's 2014
Specify license in gemspec
Convert README to Markdown
README cleanup
Add Gem version badge
Add Code Climate badge
More standard gitignore
Freeze values of constants
Setup Travis CI