Added a note to the "Browser" section of README.md. This closes #769.
Added a note to the "Browser" section of README.md.
This closes #769.

bitcoinjs/bitcoinjs-lib,BitGo/bitcoinjs-lib,junderw/bitcoinjs-lib,UdjinM6/bitcoinjs-lib-dash,BitGo/BitGoJS,BitGo/BitGoJS,BitGo/BitGoJS,bitcoinjs/bitcoinjs-lib,BitGo/bitcoinjs-lib,junderw/bitcoinjs-lib,visvirial/bitcoinjs-lib,visvirial/bitcoinjs-lib,BitGo/BitGoJS