Support for closing after uploading * minor design changes

![screen shot 2013-07-14 at 22 41 46](https://f.cloud.github.com/assets/49038/794992/1d94b4a8-eccf-11e2-8407-140aecf0fe06.png)

![screen shot 2013-07-14 at 22 41 36](https://f.cloud.github.com/assets/49038/794993/1fab8884-eccf-11e2-8266-271fc7df877b.png)

I've added the ability to close the app after the upload has finished, I very rarely want it around after it's done it's job of uploading the file. And did some minor design tweaks which I feel make it look better. Open to opinions / rejection, had a spare hour whilst some data was parsing.