clarify need for bitcoind in examples
Merge pull request #103 from maraoz/bug/update-README

clarify need for bitcoind in examples
fix ripemd160 for browser and add tests
Merge pull request #105 from maraoz/bug/ripemd160-fix

fix ripemd160 for browser and add tests
prevent requiring bitcoinjs-lib each time
fix examples
Merge pull request #109 from matiu/feature/opt-require

Feature/opt require
support for compressed pub key import
change name to print function
add support for Sign and Verify in Key for Browser. Tests added
add KeyModule example to browser
remove constructor params in browser version of KeyModule
Merge pull request #112 from matiu/feature/sign-verify-browser

Feature/sign verify browser