As BeautifulSoup is required, add it to requirements.txt
date was missing in import. Fixed.
base64 module is not needed, so remove it.
ArchivedExpense's were not being saved. Fixed.
update_legislators_extra_data() has a bug that if a Legislator is found on the website but not on the database, it returns an error and stops the update.

Now we check for that.
Merge pull request #14 from luciocorrea/fix_senado

Fix Senado  update_data_for_year and update_legislators_extra_data()