Added unit tests for classes under immediate namespace Mdjward\RpcApi.
Added unit tests for classes under immediate namespace Mdjward\RpcApi\RequestEncoder\JsonRpc.
Added unit tests for classes under immediate namespace Mdjward\RpcApi\RequestEncoder\TransmissionRpc.
Added unit tests for classes under immediate namespace Mdjward\RpcApi\RequestEncoder\XmlRpc.
Corrections to XML-RPC classes uncovered by unit tests.
Removed the redundant Marshallable package/namespace and all classes contained within.
Configured .gitignore and added composer.lock into the repository.