Merge pull request #2 from NatashaTheRobot/adding_sending_with_blocks

added send with web with success and failure blocks
changed API url from sendgrid.com to api.sendgrid.com
fixed casing on SendGrid
Multiple Images attachment
inline image html example
Merge pull request #4 from iancarv/multiple-image-attach

Multiple Images attachment
Created email object class
Moved all email information to Email class
Updated Readme
Refactor. Changed every 'password' to 'key'
small refactor
removed xsmtp header
changed class email to SendGridEmail
added support for the SMTPAPI lib
added setTos method to SendGridEmail
updated README
Merge pull request #6 from heitortsergent/master

Updated lib to be more similar with other languages
Adding podspec, updating to 0.2.0
minor spelling correction
Fixes #5, only require html or text parameter