Update event.html
add subscriptiontrack x-smtpapi example
change API host to api.sendgrid.com in all endpoints and examples
Added note in Clicks section

Testing has confirmed that user's clicking an SG Unsub do not count as a click. Added note to explain this.
Added Webhooks box

Added Webhooks box, since we're promoting Event, and because it's so far down the main menu.
fixed padding around front page items
linked to debug section, rather than providing an incomplete guide
remove seedlist app
remove bad link
Update whitelabel_wizard.html

Changed example on SPF record to remove 'a' and 'mx' tags, since the Whitelabel Wizard itself does not have them on the UI.
Merge pull request #249 from jaysonsperling/patch-1

Update whitelabel_wizard.html
change where search index state is stored
add swiftmailer option to drupal page
add drupal swiftmailer screenshot
add .jekyll_indextank to gitignore
small tweaks to java example
add sendgrid4j java library
Use cases of Event Webhook intro (#39)
merge develop (for easier future merging)