Add SMS-required exceptions

Add SMS-required exceptions for DigitalOcean, BuyCraft, BitLy and
Wordpress.com.
Update Salesforce doc, add email method
Merge pull request #911 from jdavis/update-salesforce

Update Salesforce
Merge pull request #902 from psgs/sms-required

Add SMS-required exceptions
Added dwolla to banking list.
Modified banking file.
Shrunk.
Moved dwolla to payments.
Merge pull request #913 from j256/master

Added dwolla to payments section.