Timer continued

This is a continuation of #505, updated for `bttf`. Sorry for the monster merge commit in there, apparently I don't know how to rebase :/. I'm still looking for a good alarm sound to play on completion of the timer.

![screenshot from 2014-06-01 20 32 01](https://cloud.githubusercontent.com/assets/4411471/3143224/f8501d5a-e9ed-11e3-96c2-70392eaafd7f.png)
![screenshot from 2014-06-01 20 32 53](https://cloud.githubusercontent.com/assets/4411471/3143225/f95f7308-e9ed-11e3-94bb-f119c91cd3b1.png)
![screenshot from 2014-06-01 20 33 37](https://cloud.githubusercontent.com/assets/4411471/3143226/fad91bf8-e9ed-11e3-8ba8-ccfec23b9b0a.png)
<img src="https://cloud.githubusercontent.com/assets/4411471/3143242/ab412080-e9ee-11e3-89db-bbff142e2784.PNG" width="250px" />

Not sure how I feel about the spacing in the mobile screenshot, though.

Last one--please change this to `margin: 127px auto` so that it covers the timer exactly.

It currently looks like this:

![screen shot 2014-07-11 at 2 50 36 pm](https://cloud.githubusercontent.com/assets/81969/3557169/4bae4208-092c-11e4-92bc-b9484a8462c7.png)

But a few changes makes it look better:

![img_0080](https://cloud.githubusercontent.com/assets/81969/3557179/6c0b4d16-092c-11e4-9589-9357b40fba89.JPG)
![img_0078](https://cloud.githubusercontent.com/assets/81969/3557178/6c0b32ae-092c-11e4-82f5-a605110b6930.PNG)