mention template lookup semantics in readme...
mention template lookup semantics in readme...

see:
https://github.com/EventedMind/iron-router/issues/999

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