Cleaner Code base and secondary URL introduced

We cleaned up the code base to allow full coverage on unit testing and also have more control over what variable we are using. Also we introduced a secondary URL just in case you are planning to use the module where google is not available.

Invisible ReCaptcha introduced

• Introduce "size" to allow invisible ReCaptcha
• Fix documentation with mismatched reference

Initial component published

Component is published to npm under https://www.npmjs.com/package/google-recaptcha-react-component