Task 469

"Make an info block at the top of the page (see descr)
Should say ""This App is only available to Silver accounts and higher""

Link ""Silver and higher"" phrase to https://sendgrid.com/pricing"
Task 475

"Make an info block at the top of the page (see descr)
Should say ""This App is only available to Silver accounts and higher""

Link ""Silver and higher"" phrase to https://sendgrid.com/pricing"
Task 329

Link to Bounces:
https://sendgrid.zendesk.com/hc/en-us/articles/200181478
Task 459a

"Make an info block at the top of the page (see descr)
Should say ""This App is only available to Silver accounts and higher""

Link ""Silver and higher"" phrase to https://sendgrid.com/pricing"
Merge branch 'develop' of https://github.com/anishaingram/docs-1 into anishaingram-develop

Conflicts:
	source/Apps/address_whitelisting.html
	source/Apps/footer.html
	source/Apps/spam_checker.md
	source/Delivery_Metrics/email_reports.html
Merge branch 'anishaingram-develop' into develop