QmlProfiler: Refactor

The code of the qmlprofiler client has become a bit too complex,
this patch reorganizes the modules in a more sensible way,
having the modules communicate with each other through a
state machine instead of the excess of signals and slots
from before.

Change-Id: I76f7313779888a1bd07a1cdb1acbf2e47aacf42a
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

src/libs/qmljsdebugclient/qmlprofilereventlocation.h

@@ -35,6 +35,8 @@
 
 #include "qmljsdebugclient_global.h"
 
+#include <QString>
+
 namespace QmlJsDebugClient {
 
 struct QMLJSDEBUGCLIENT_EXPORT QmlEventLocation