Added new configuration for email notifications.
Initial commit for email notifications.
Merge branch 'comment-notifications' of https://github.com/PiranhaCMS/Piranha.vNext into comment-notifications
Fixed page cache error. Closes #85
Merge pull request #86 from PiranhaCMS/fix-page-cache-error

Fixed page cache error. Closes #85
Moved comment notification to background thread. Closes #75
Merge pull request #87 from PiranhaCMS/comment-notifications

Comment notifications
Fixed null pointer exception when saving config. Closes #88
Merge pull request #89 from PiranhaCMS/fix-comment-config-bug

Fixed null pointer exception when saving config. Closes #88
Added API-key trimming. Closes #90
Merge pull request #91 from PiranhaCMS/trim-akismet-apikey

Added API-key trimming. Closes #90