Devoncarew progress component

Create a polymer component to show progress and status. This will let us combine several different components in the toolbar in one place and in a slightly more cohesive way. Comments welcome, as I suspect not all of this work was done in a polymer happy way.

![screen shot 2014-01-18 at 10 33 36 pm](https://f.cloud.github.com/assets/1269969/1949013/242c123a-80d5-11e3-9547-1fcbe0d36ed0.png)

![screen shot 2014-01-18 at 10 33 46 pm](https://f.cloud.github.com/assets/1269969/1949014/2b6bd2c4-80d5-11e3-8b5e-a3d8fbb83525.png)

@ussuri