Version Bump v3.2.0: sendgrid#12 Add a helper returns the response bo… …dy as a hash

Version v3.1.0: sendgrid#5 Ability to set the Content-Type header 

Version Bump v3.0.2: sendgrid#8 Internal refactor 

Version Bump v3.0.1: Turn on verification of TLS certificates 

Verson Bump v3.0.0: BREAKING CHANGE response header is now a hash ins… …tead of a string

Version Bump v2.1.4: Pull request sendgrid#2 

Version Bump v2.1.2: Typo in 2.1.1 fix 

Version Bump v2.2.1: Fix edge case for POST 

Version Bump v2.1.0: Automatically add Content-Type: application/json… … when there is a request body

Versiom Bump 2.0.0: Made the Response variables non-redundant. e.g. r… …esponse.response_body becomes response.body