Added a simple in-session bell

[djibux]

Hello.
Here is an implementation of #1. Hope you like it. I use it :)

[wlach]

Hey, sorry for the late response here; this looks interesting, I'd have to think about whether it makes sense to add this to my meditation timer, as part of the point is to keep things simple. You should feel more than welcome to publish a fork with this added though. :)

[djibux]

Thanks for the feedback. I don't see the point of having two very similar apps on the market. I might end up publishing one if I make significant changes. Thanks.