Added some config settings

[CONFIG] Added reporter-period - how often the reporter should be run.
[CONFIG] Added max-pending-notifications and max-pending-notifications-per-user
(also accidentally did "Correct Indentation" on the entire Config class, sorry for the mess)
[FEATURE] When the limit of notifications for the server is reached, a message is sent to the console. This message won't be sent more often that once a hour, so it won't spam the console. (I used loglevel WARNING for this, we can change it if you think INFO is better)
[FINISHED UP] Added some text for the /rsme command regarding reports.