Added sound settings page

+ added sound setting page
+ added sound setting icon
+ moved sound settings from interface settings

Added master volume

+ added master volume slider.
+ volume can be changed by sliding bar or by using the spin box
+ Preview of  volume will be played when dragging and releasing bar.

Added checks for qt4

Qt4 does not have support for setting the volume without some lengthy
work around, I have disabled volume control for qt4 users and have
mentioned that "Master volume requires qt5".

Updated sfx

+ removed all old sfx
+ added new end step and tap sound
+ tap/endstep sound has a timer on it to prevent spamming
+ test sound engine will now use endstep sound

Made end step sfx softer

end step felt too harsh

Added player joined sound

+ added a sound for when a new player joins a room

Updated

Was missing a sound when a player joins

Made end step softer

Made end step even softer

updated sound again

cockatrice/src/soundengine.h

@@ -3,6 +3,7 @@
 
 #include <QObject>
 #include <QMap>
+#include <QDateTime>
 
 class QAudioOutput;
 class QBuffer;
@@ -14,19 +15,17 @@ private:
     QMap<QString, QByteArray> audioData;
     QBuffer *inputBuffer;
     QAudioOutput *audio;
+    QDateTime lastTapPlayed;
+    QDateTime lastEndStepPlayed;
 private slots:
     void cacheData();
     void soundEnabledChanged();
 public:
     SoundEngine(QObject *parent = 0);
 public slots:
-    void notification();
-    void draw();
-    void playCard();
-    void shuffle();
+    void endStep();
     void tap();
-    void untap();
-    void cuckoo();
+    void playerJoined();
 };
 
 extern SoundEngine *soundEngine;