Use _site_transient for multisite
Merge pull request #131 from deliciousbrains/use_set_site_transient

Use _site_transient for multisite
Remove transient caching of permission check
Merge branch 'develop' into remove-permission-check-cache

Conflicts:
	classes/amazon-s3-and-cloudfront.php
Low DPI style fixes.
Merge pull request #137 from deliciousbrains/remove-permission-check-cache

Remove transient caching of permission check
Merge pull request #132 from deliciousbrains/email-optin

Pro version promo sidebar and email opt-in
Merge branch 'develop' into update-readme