Update home.html

Updated home.html with text from pull request #2
Moved all html and js to the 'www' folder
Added stub pages for bitcoin core and rpc, and stub tutorial for converting to bitcoin-cli.
Cyan navbar to match a bootstrap theme. Still more CSS work to do on responsive layout dropdown background and icon color.
Merge pull request #4 from jtibble/dev-content

Stubs for core/rpc/bitcoin-cli pages, new cyan theme