Debugger: Export DebuggerManager and DebuggerStartParameters.

For device debugging. Move both from namespace
Debugger::Internal to Debugger, export them, give
DebuggerManager a static instance().

src/plugins/debugger/watchwindow.cpp

@@ -33,6 +33,7 @@
 #include "debuggeractions.h"
 #include "debuggeragents.h"
 #include "debuggerdialogs.h"
+#include "debuggermanager.h"
 
 #include <utils/qtcassert.h>
 
@@ -50,6 +51,7 @@
 #include <QtGui/QMenu>
 #include <QtGui/QResizeEvent>
 
+using namespace Debugger;
 using namespace Debugger::Internal;
 
 /////////////////////////////////////////////////////////////////////