Styling and bug fix

- Fixes the NaN bug when ```post.location``` does not contain a ```latitude``` or ```longitude``` attribute.
- Adds ```reset.css````
- Makes all pictures links to original post.
- Changes a lot of CSS after you search for a hashtag. If you agree with the styling, can you make a map for the landing page using those two hex values?
I wanted to go for something like this for the map.

![](http://stamen.com/files/cloudmade/24-midnight-helsinki.jpg)