Adding a package-lock.json and npm-shrinkwrap.json file

[DavidKDeutsch]

Not sure if this will fix all the issues people have experienced, but this will lock the version of bcoin to 1.0.0-beta.12, which certainly fixed my issues.

For example, as of today (9/15/2018), if you just run npm install the bcoin version you get will have bcoin.KeyRing PascalCased, whereas the mbexport code expects bcoin.keyring (all lowercase)

[ghost]

Dear David,
Been installing the node.js 14.15.1 Windows 64 version and following the instructions and also installing "npm install -g mbexport". In the command prompt I'm getting some errors. Not sure on how to proceed extracting my private key from the Multibit HD 0.5.1 as mbexport doesn't seem to work.
Have attached a screen shot (hiding the wallet directory as I'm not sure if that contains some vital info).

Thanks
Anders