v1.13.0

• [mdl] new useraccounts:mdl package to get UI templates styled for Material Design Lite (kudos to @kctang and @liquidautumn, thank you guys!).
• [flow-routing] added support for React-based layouts (merged meteor-useraccounts/flow-routing#20 tnx @timothyarmes).
• [materialize] fixed offset problem for fullPageAtForm on medium screens.
• [materialize] fixed some margins (see #19).
• [iron-routing] fixed a problem with route paths (merged meteor-useraccounts/iron-routing#8 tnx @trave7er).
• [core] updated dependency to softwarerero:accounts-t9n@1.1.7
• [core] fixed a bug with reCaptcha (merged meteor-useraccounts/core#565 tnx @scsirdx).
• [core] added missing dependency on JQuery (merged meteor-useraccounts/core#574 tnx @stubailo).
• [core] added postSignUpHook hook to let people modify newly created user objects (merged meteor-useraccounts/core#586 tnx @shwaydogg)
• added Meteor Icon badges to all packages' README file.