Use BIP44 Compliant Tree Generation

[danfinlay]

This will allow Metamask to share accounts with testrpc, as described in this discussion (Thanks @tcoulter!)

Will also allow Metamask to share accounts with Jaxx, a current wallet that is fairly popular.

[danfinlay]

Note from conversation with Chris Lundkvist:

danfinlay [3:45 PM]

Hey Chris, I’m trying to get Metamask BIP44 compliant so it interoperates with testrpc, and since we use light-wallet I thought you’d be the guy to ask. Our current wallet generation is this: https://github.com/MetaMask/metamask-plugin/blob/master/app/scripts/lib/idStore.js#L269-L276
I’m not really clear what to do differently to make it BIP44

chrislundkvist [4:10 PM]

There is a function setDefaultHDPath where you can set the path. So you would call this function before you do anything else. I think what you want as your path is the string m/44'/60'/0'/0