Currently it only allows the admin to enable or disable the HTTPS
enforcement, but in the future it could be expanded to further options.

The HTTPS enforcement only allows the admin to enforce it, if he is
connected via HTTPS. (To prevent admins to enable it without a proper
SSL setup)

The notification div has been moved to the user templates.
Correct display of the notification will only work with the use of OC.Notification.show() as on fadeIn() the css needs to be changed as this style required display: inline.

THX @VicDeo

cleaning up the settings. standardize the format, add missing I10N and other small things. Yes. This is not perfect. But way better than before ;-)

add a check and a warning if the ownClodu server is not able to establish http connections to the internet. The reason is that users complained that external filesystem support, the update checker, downloading of new apps or the nowledgebase don´t work and don´t know why.

This reverts commit e6b81538.

Added method getAppstoreApps to OC_App
Added minor documentation