v6.0.0 (MetaMask#66)

* 6.0.0

Merge pull request MetaMask#27 from brunobar79/remove-account

added removeAccount

Version 3.1.1

Version 3.1.0

Version 2.2.0

Version 3.0.1

Version 3.0.0

Major version bump for removing "Identities" (and nicknames) from the
library.

Version 2.1.5

Merge pull request MetaMask#7 from MetaMask/BinaryTypedDataField

Version 2.1.4