added note on closure templates
added note on closure templates

- referred to gist
- added medium blog post

loverajoel/incremental-dom,YOTOV-LIMITED/incremental-dom,sparhami/incremental-dom,Rich-Harris/incremental-dom,paolocaminiti/incremental-dom,jridgewell/incremental-dom,reggi/incremental-dom,jridgewell/incremental-dom,PolymerLabs/incremental-dom,google/incremental-dom,loverajoel/incremental-dom,Rich-Harris/incremental-dom,PolymerLabs/incremental-dom,sparhami/incremental-dom,google/incremental-dom,reggi/incremental-dom,YOTOV-LIMITED/incremental-dom,google/incremental-dom,jridgewell/incremental-dom,PolymerLabs/incremental-dom,markuskobler/incremental-dom,sparhami/incremental-dom,sparhami/incremental-dom,paolocaminiti/incremental-dom,markuskobler/incremental-dom