Improved options and notifications

**Updates**
* added 3 check-boxes on option screen to enable/disable specific notifications
* added notifications
* re-factored notification code
* removed runtine reload to stop throwing user back to chrome store on option save
* removed disable from buttons/fields in options

**Types of notifications**
* Notify when another hour ticks over on Codeivate.com
* Notify when a language you code in gains a level
* Notify if you stop programming for 10 minutes