Replace Kryo serializer with simple Java serializer.
Remove unused ResourceInfo interface.
Make protocol configuration a part of ClusterConfig.
Add support for user provided execution contexts.
Add Vert.x execution context.
Add simple Vert.x event bus lock service example.
Normalize Vert.x package naming.
Add Vert.x 3 execution context.
Change execution context return value to match common Java APIs.
Fix compile issues with scheduled futures.
Update cluster configuration in README documentation.