Updated opt-in language on MobilizeAmerica sign-up forms

Addition of language below signup button:

• “By clicking the button above you agree to the Terms of Service and Privacy Policy.”

Opt-in language on signup page (next to checkbox):

• “I want to get updates on how to stay involved and agree to receive occasional automated text messages from  and MobilizeAmerica. Message and data rates may apply. Text STOP to cancel or HELP for help.”