Add Custom Vibrate Patterns to Settings

I added the ability to choose custom vibrate Patterns. This fixes issue #230 You can chose between:

* default
* 2x short
* 2x long
* 3x short
* 3x long
* custom (you can specify off-time, on-time)

Of course I'm open to different standard vibrate patters or other changes.

This is my first pull request and I'm quite new to Java and Android, so please be gentle ;)


On 06/20/2014 03:41 PM, agrajaghh wrote:
> I tried it, but the problem is that the setting will be displayed wrong
> nevertheless. getNotificationVibrate is not called when you open the
> settings and the summary is displayed. I think the real migration is the
> better way....

You can't be guaranteed that activity runs first.  Migrations should be
avoided whenever possible.

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