Refs #113 Updated local notification code.

- Local notifications now triggers
- Updated message to be a little less time sensitive. (include time of session instead of «starts in 5 minutes»
- If notification is received while application is in foreground we present the user with an alert letting him/she decide to open session or not.
- If notification received while in background, show session immediatly.
Removed custom class from storyboard that no longer excisted.
Fixed merge error.