fixes redmine 2186

 by updating data citation information with datacite record and doi https://ebi-forecast.igb.illinois.edu/redmine/issues/2168

@udaysaraf can you please check the following and then reassign to @gsrohde?

1. new citation information should appear in the header of the csv file downloaded from the search page (e.g. https://www.betydb.org/search.csv?&search=Switchgrass)
2. The footer citation info is updated (see image of old footer below)
![image](https://cloud.githubusercontent.com/assets/464871/3990142/757905f6-28c5-11e4-8c62-f9376e4e2e87.png)
3. The public/UI_redesign/index.html is also valid