browser: use request for proxying

Switch to mikeal/request to proxy for rest server.  "proxy/middleware"
was unstable.
chore: remove files not in use

Remove some files that we don't yet use.
README update, and delete scripts dir
chore: browser/dev-tasks README update

Provide message that the build process isn't intended to be modified
by developers in EA2.
README update
README edits
chore: readme update for two terminal windows
chore: clarify stop/restart instructions
chore(browser build): remove old bower components

Remove stray references to bower components that we have chosen not
to use.
chore: clarify stop/restart instructions