MUMUP-1403: Be able to tell users about new stuff

## New Stuff!

Lightweight notification to let users know about new functionality. We talked about different ways to do this, but I just went ahead and implemented an easy way to do this that I think works well. 

There is a small box telling the user about the new feature, and a link to a 'blog' where we can store a list of all of our pushed features.

![image](https://cloud.githubusercontent.com/assets/3534544/5416734/1036b3b4-81f8-11e4-9609-e7319774b24c.png)


We are not going to use the blog posting at this time, but we are going to keep it (no harm).

![image](https://cloud.githubusercontent.com/assets/1919535/5402300/f4611b48-8148-11e4-803d-9affbe505da6.png)

Still stuck on how to hide this when a user wants to get rid of it. We could do this with ngStorage, but then what if we push a new feature soon after that? We would need a way to redisplay the div when we push a new feature. @timlevett, might need help with ngStorage if we decide to use it.