Support for compile-time included WebApplications.

Conflicts:
	parity/main.rs

Propagate transaction queue

Use new json RPC server

Gracefully dying when trying to enable RPC and app is compiled without it.

Conflicts:
	parity/main.rs

Additional logging and friendlier error messages

Avoid signalling readiness when app is about to be closed.

fixed #875 and added tests for eth_sendTransaction

passing key path to all invocations

Fixed eth_call nonce and gas handling