Fix external urls for Android

client/lib/cordova/urls.coffee

 Meteor.startup ->
 	return unless Meteor.isCordova
-	platform = device.platform.toLowerCase()
 
 	# Handle click events for all external URLs
 	$(document).on 'deviceready', ->
+		platform = device.platform.toLowerCase()
 		$(document).on 'click', (e) ->
 			$link = $(e.target).closest('a[href]')
 			return unless $link.length > 0