added regex to remove extra spaces in full-foia-contacts.xls

This should fix [Issue 149](https://github.com/18F/foia-hub/issues/149)

Turns out that the Economic Development Administration wasn't loading because it had an extra space in the full-foia-contact.xls file as in "Economic Development Administration ". 

The [file](http://www.foia.gov/full-foia-contacts.xls) is hosted on foia.gov so I opted for the regex solution instead of fixing the file. If anyone has a contact, I can email them if needed. 
In Python, you can just do row['Agency'].strip() which will remove all leading and trailing spaces. This is preferable to doing this with regex.