Support Rivine 1.0 API

[bart-at-mobicage]

First investigate how much stuff has changed and how much time we need to implement this. Let's discuss afterwards to check for a timing when we do this.

[lucasvanhalst]

This function (and some functions it calls) and the data objects will need to be changed: https://github.com/our-city-app/mobicage-android-client/blob/1eb0df9113da600cc23db3d37fe5a54afed1b619/rogerthat/src/main/java/com/mobicage/rogerthat/util/security/ed25519/Ed25519.java#L181

Not sure about iOS but I think it will be less work since we use something generated from the golang rivine code

The wallet (embedded app) will need to be updated so it uses the new data structure.

[lucasvanhalst]

Pull requests:

• https://github.com/our-city-app/cordova-mobicage-payments-plugin/pull/1
• https://github.com/our-city-app/rivine-wallet-utils/pull/1
• https://github.com/our-city-app/mobicage-android-client/pull/67
• https://github.com/threefoldfoundation/rivine-wallet/pull/14
• https://github.com/our-city-app/mobicage-ios-client/pull/69

[lucasvanhalst]

ready to review @bart-at-mobicage