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

include/utils/Process.h

@@ -0,0 +1,8 @@
+#include <string>
+
+namespace Process {
+	
+void restartHyperion(bool asNewProcess=false); 
+std::string command_exec(const char* cmd);
+
+};