Dapps and RPC server merge (#5365)

* Dapps server as a middleware.

* Dapps RPC - Work in Progress

* Merging Dapps and RPC server.

* Fast HTTP server configuration.

* Bump jsonrpc

* Fixing test target

* Re-implementing commented-out tests.

scripts/targets.sh

@@ -5,7 +5,7 @@ export TARGETS="
 	-p ethash \
 	-p ethcore \
 	-p ethcore-bigint\
-	-p ethcore-dapps \
+	-p parity-dapps \
 	-p ethcore-rpc \
 	-p ethcore-signer \
 	-p ethcore-util \