v0.2.0 - ethr-did support

* add `:ethr-did` module with support for [resolving `ethr-did`s](https://github.com/uport-project/ethr-did-resolver) 
* move [uport-android-signer](https://github.com/uport-project/uport-android-signer) into this SDK as `:signer` module
* allow multiple root accounts
* add option to delete an account

v0.1.1 - import seed phrases

• add option to import seeds phrases as account
• [bugfix] default account is updated on first creation

v0.1.0 - default to KeyPair accounts

• default account type is KeyPair
• updated kethereum to 0.53 , some APIs have changed to extension functions
• updated uport-android-signer - allows minSDK to be 21
• renamed Uport.defaultAccount?.proxyAddress to publicAddress

v0.0.2

• add coroutine support for account creation
• add getAddress() to Account objects