implement hyperion restart via webui (#242)

* first try

* implement hyperion restart. core function is good, but needs a beeter structuring- something for next refactoring session ;-)

* several fixes (including osx)
merge with upstream
some refactoring

* add some eye candy to webui

libsrc/jsonserver/JsonClientConnection.cpp

@@ -2,6 +2,7 @@
 #include <stdexcept>
 #include <cassert>
 #include <iomanip>
+#include <unistd.h>
 
 // stl includes
 #include <iostream>
@@ -15,6 +16,7 @@
 #include <QHostInfo>
 #include <QString>
 #include <QFile>
+#include <QCoreApplication>
 
 // hyperion util includes
 #include <hyperion/ImageProcessorFactory.h>
@@ -27,6 +29,7 @@
 #include <leddevice/LedDevice.h>
 #include <HyperionConfig.h>
 #include <utils/jsonschema/JsonFactory.h>
+#include <utils/Process.h>
 
 // project includes
 #include "JsonClientConnection.h"
@@ -883,6 +886,12 @@ void JsonClientConnection::handleConfigCommand(const Json::Value & message, cons
 	{
 		handleConfigSetCommand(message, full_command, tan);
 	} 
+	else if (subcommand == "reload")
+	{
+		// restart hyperion, this code must be put in some own class ... 
+		Process::restartHyperion();
+		sendErrorReply("failed to restart hyperion", full_command, tan);
+	} 
 	else
 	{
 		sendErrorReply("unknown or missing subcommand", full_command, tan);