rpc: various fixes/enhancements

rpc: be less restrictive on the request id
rpc: improved documentation
console: upgrade web3.js to version 0.16.0
rpc: cache http connections
rpc: rename wsDomains parameter to wsOrigins

cmd/geth/js.go

@@ -237,7 +237,7 @@ func (js *jsre) apiBindings() error {
 	}
 
 	// load only supported API's in javascript runtime
-	shortcuts := "var eth = web3.eth; "
+	shortcuts := "var eth = web3.eth; var personal = web3.personal; "
 	for _, apiName := range apiNames {
 		if apiName == "web3" || apiName == "rpc" {
 			continue // manually mapped or ignore