Remove cruft and fix dependencies, including peer dep on jolocom-lib

[mnzaki]

• Removed various unused dependencies (tech debt from SW and pre-SW days)
• Removed some more react native remnants, especially tests
• Removed browserify stuff, we are on node now
• Made jolocom-lib a peerDependency to avoid issues with importing different runtime classes etc if jolocom-lib is independently installed at the top level of an application, alongside @jolocom/sdk