Memorial fixtures

The associated images are uploaded to s3 and in the media repository.

Note to @annalee and @msecret - if you're going to load these fixtures, you'll need to delete the ones in your db. 

```sql
delete from peacecorps_campaign where campaigntype='mem';
```

![screen shot 2014-12-23 at 1 43 54 pm](https://cloud.githubusercontent.com/assets/326918/5541670/d695fd30-8aa9-11e4-9135-86ce7a6accd6.png)