Version Bump v2.3.2: fix maven upload

Version Bump v2.3.1: Fix charset: Use UTF-8 charset instead of defaul…

…t ISO-8859-1

Version Bump v2.3.0: Automatically add Content-Type: application/json…

… when there is a request body

Merge branch 'master' of https://github.com/sendgrid/java-http-client

Version Bump 2.2.0: Can pass test flag to allow for http calls

Version Bump:2.1.0: DELETE can now have a request body

Update README.md

Travis