Merge pull request #638 from sendgrid/master

Merge 

Closes #540
Closes #338
Added SendGrid-Android
Fixed curl sslv3 option

$curl wasnt defined, used $session var which is appropriate for this examples
Merge pull request #642 from adeam/patch-1

Fixed curl sslv3 option
Merge pull request #640 from sendgrid/develop

Merge ⑆