* Added mail template for manual payouts
* Added code to account page to notify via mail on payout
* Added new option to notification setting template
Adds another feature to #144
* Modified findblocks cron
* Modified notifications cron for new structure
* Improved notification class
* Added new template for new_block type
* Moved idle_worker type template
* Added new_block type to notification settings
* Adding new SQL upgrade for notifications
* Added support for per user notification settings
* Added account_id to notifications table
* Added new notification_settings table
* Added new account page: notifications
Addresses #144
