* big(bytes) == 0 when len(bytes) > 0

* Added additional chain tests
* Added proper mutex' on chain
* Removed ethereum dependencies

* Depth check has been moved to the execution
* Pre compiled execution has been moved to the VM
* PrecompiledAddress has been renamed to PrecompiledAccount

p2p: fix decoding of disconnect reason

Test-tastic.

Added Dockerfile to build from source

* Added filters / watches
* Removed event dep