README updates (#57)
README updates (#57)

* fixed pattern usage in the README

* added demo section to the hooks/README

* added browser support section

* updated hooks README

* updated README

* updated title

* reverted title change

* updated typos

* fixed consistent version up mark

* renamed from Navigator deviceMemory API to Device Memory API

* updated API namings

* cleaned up secondary contents for now

* added hardware concurrency code splitting demo to hooks/README

GoogleChromeLabs/adaptive-loading,GoogleChromeLabs/adaptive-loading,GoogleChromeLabs/adaptive-loading