fix clear all region data on each run
fix clear all region data on each run

this makes sure that data doesn't linger around from one route to the
next.

cc @tmeasday, double check this design when you get a moment.

sean-stanley/iron-router,Sombressoul/iron-router,jg3526/iron-router,ecuanaso/iron-router,DanielDornhardt/iron-router-2,abhiaiyer91/iron-router,Hyparman/iron-router,abhiaiyer91/iron-router,TechplexEngineer/iron-router,tianzhihen/iron-router,Aaron1992/iron-router,appoets/iron-router,ecuanaso/iron-router,iron-meteor/iron-router,snamoah/iron-router,Aaron1992/iron-router,jg3526/iron-router,leoetlino/iron-router,firdausramlan/iron-router,assets1975/iron-router,snamoah/iron-router,appoets/iron-router,assets1975/iron-router,Sombressoul/iron-router,iron-meteor/iron-router,tianzhihen/iron-router,DanielDornhardt/iron-router-2,Hyparman/iron-router,TechplexEngineer/iron-router,firdausramlan/iron-router,sean-stanley/iron-router