remove "use strict" which is causing problems.

"use strict" enforces good js. We should go through and carefully add "use
strict" throughout bitcore and fix all problems that are found along the way.
Merge pull request #50 from ryanxcharles/bug/remove-use-strict

remove "use strict" which is causing problems.
added README for browser build
starting address migration
EncodedData working in the browser
Address working in the browser