Events cleanup

- Only allow an integer number of events on the page (using @media queries)
- Put the title in the absolute center of the event header
- Expand the opacity to fill the header
- Clean up some margin and padding issues in the bx-slider code
- Add back in the functionality of the navbar-spacer to avoid a jump when the navbar sticks to the top of the screen
- Make all social icons the same size.
- Reinforce the navbar height of 50px.

![screen shot 2013-11-20 at 9 16 27 pm](https://f.cloud.github.com/assets/2433509/1588532/325c639c-5253-11e3-8e01-f317f6a3ec3b.png)
![screen shot 2013-11-20 at 9 16 32 pm](https://f.cloud.github.com/assets/2433509/1588534/325dedf2-5253-11e3-886f-b3f727fdd111.png)
![screen shot 2013-11-20 at 9 16 36 pm](https://f.cloud.github.com/assets/2433509/1588535/325e1fb6-5253-11e3-82ad-4fafa1fb733f.png)
![screen shot 2013-11-20 at 9 16 41 pm](https://f.cloud.github.com/assets/2433509/1588533/325de226-5253-11e3-834a-615d91c82e6e.png)
![screen shot 2013-11-20 at 9 16 56 pm](https://f.cloud.github.com/assets/2433509/1588537/325f9abc-5253-11e3-9f13-79b6462824af.png)
![screen shot 2013-11-20 at 9 17 02 pm](https://f.cloud.github.com/assets/2433509/1588536/325ed3b6-5253-11e3-8c80-7f54d3a8bce4.png)