v1.12.4

• fixed input element classes for useraccounts:materialize (see meteor-useraccounts/materialize#18)
• fixed query parameters look-up for useraccounts:iron-routing
• updated useraccounts:polymer to use Polimer 1.0 (see updated boilerplate with some instructions for Meteor 1.2)
• updates and fixes for useraccounts:flow-rounting (see meteor-useraccounts/flow-routing#12)
• improoved css for useraccounts:semantic-ui
• disallowed use of signUp state in case forbidClientAccountCreation is set (see #547)
• updated dependency on softwarerero:accounts-t9n to version 1.1.4
• a bit of linting here and there...
• a few typos correction and improvements to the Guide