Added a lightweight logger wrapper around go-ethereum/log which adds StatusIM prefix to all messages and allows to clearly distinguish between status-go and go-ethereum logs.
Logs under vendor/go-ethereum left unchanged because those pieces of code might undergo huge refactoring in the near term.
- node: signals and node reset, fixes#152
- tests update (testify is used)
- node manager refactored, race conditions fixed
- node wrapper has been removed, we rely on go-ethereum node now
- tx queue refactored
- jail refactored
- backend and API introduced