Add Controllers

- Add Json RPC methods
- Add REST endpoint

Update to version 2.0.6

Merge pull request #18 from TIHBS/load-connection-profile-subtypes-at…

…-start

Load ConnectionProfile subtype at start

Load ConnectionProfile subtype at start

Refactor tests

Merge pull request #14 from TIHBS/fix/issue-13

Allow Invoking Read-only Ethereum Smart Contracts Asynchronously

Update README.md

Fix filter checking and disable platform-dependent tests

fix error handling and callbacks

Update SmartContractFunctionArgument.java