First steps toward a responsively designed client

Since these are mostly changes to design, I decided to take some screenshots...

**Wide view**

![note list](https://cloud.githubusercontent.com/assets/3881885/3710504/a5179d38-1491-11e4-9a15-bf19efda646f.png)
![sample notes, scrolled up](https://cloud.githubusercontent.com/assets/3881885/3710506/a533a6ea-1491-11e4-8e80-4cb3babf71cc.png)
![sample notes, scrolled down](https://cloud.githubusercontent.com/assets/3881885/3710505/a51a8318-1491-11e4-9dc2-26309e62a56f.png)

**Medium view**

![note list](https://cloud.githubusercontent.com/assets/3881885/3710502/a5043694-1491-11e4-8869-216274819b18.png)
![sample notes, scrolled up](https://cloud.githubusercontent.com/assets/3881885/3710507/a53559ae-1491-11e4-8fe1-f4ba54a90f5a.png)
![sample notes, scrolled down](https://cloud.githubusercontent.com/assets/3881885/3710503/a506aa5a-1491-11e4-89b5-8e02383d0db3.png)

**Small view**

![note list](https://cloud.githubusercontent.com/assets/3881885/3710508/a537010a-1491-11e4-8668-3b668e8a66b3.png)
![sample notes, scrolled up](https://cloud.githubusercontent.com/assets/3881885/3710510/a54e0a3a-1491-11e4-8924-ed84e44547d9.png)
![sample notes, scrolled down](https://cloud.githubusercontent.com/assets/3881885/3710509/a538d02a-1491-11e4-98bf-43825fb9808e.png)

The client still doesn't look great at very small sizes, but I talk about that in commit [#47e7397](https://github.com/Terrycloth/cozy-notes/commit/47e739764b73160628517ca08a9106ed056973cd). I tried to be very clear about my reasoning in the commits, so read those for more details. 

I hope you like what I've done so far. Let me know if I messed up and edited the wrong files, or something needs to change.