Links, Line Wraps, and API URL

Line Wrapping - "Mailer's" was wrapping and causing the syntax highlighting to get weird for all the following code

Links - fixed the links to SendGrid's website to be https and point to the correct pages
API URL is https://api.sendgrid.com
Merge pull request #2144 from mbernier/patch-6

Links, Line Wraps, and API URL