Add rvmrc to gitignore
Don't lock rake to 0.8.7

Ditto for rspec

wow
Bump savon dependency to 2.3.0
Update response.rb
Use lowercase headers
Fix multipart detection
Add some pry goodness for debugging
Update specs to pass after @datacompboy's changes
Tie down Mail to 2.5.3

Something happened in 2.5.4 that breaks our multipart parsing