AudioFilter

- creates plugin with reverb filter
- adjusts HelloWorld and GreenScreen to fit audio/video handling from daemon
- some code cleanup

Change-Id: If4fda4dc67b9b3db14fc7395ebf3d510923b454b
GitLab: #3
diff --git a/GreenScreen/pluginMediaHandler.h b/GreenScreen/pluginMediaHandler.h
index 0e1d011..368dbd9 100644
--- a/GreenScreen/pluginMediaHandler.h
+++ b/GreenScreen/pluginMediaHandler.h
@@ -36,7 +36,7 @@
 {
 public:
     PluginMediaHandler(std::map<std::string, std::string>&& ppm, std::string&& dataPath);
-    ~PluginMediaHandler() override;
+    ~PluginMediaHandler();
 
     virtual void notifyAVFrameSubject(const StreamData& data, avSubjectPtr subject) override;
     virtual std::map<std::string, std::string> getCallMediaHandlerDetails() override;
@@ -52,5 +52,6 @@
 private:
     const std::string datapath_;
     std::map<std::string, std::string> ppm_;
+    std::string attached_ {'0'};
 };
 } // namespace jami