Merge branch 'master' of http://www.github.com/deanoemcke/thegreatsus…

…pender

Add suspend/unsuspend toggle with message (greatsuspender#579 greatsu…

…spender#594)

Improve update process. Text and translations to be finalized.

Merge branch 'develop'

Changed previews to use webp instead of jpeg

Notice functionality. Improved history/session support.

Migration bug fixes

Small bug fixes.