preparation for allowing to use wxTimer in wxBase (heavily modified patch 1113088):

1. Changed wxTimer to use wxTimerImpl
2. Added Unix-specific generic timer implementation
3. Added wxAppTraits::CreateTimerImpl()


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45544 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/dfb/evtloop.cpp

@@ -26,7 +26,7 @@
 #endif
 
 #include "wx/thread.h"
-#include "wx/timer.h"
+#include "wx/generic/private/timer.h"
 #include "wx/private/selectdispatcher.h"
 #include "wx/dfb/private.h"
 #include "wx/nonownedwnd.h"
@@ -136,7 +136,7 @@ void wxEventLoop::WakeUp()
 void wxEventLoop::OnNextIteration()
 {
 #if wxUSE_TIMER
-    wxTimer::NotifyTimers();
+    wxGenericTimerImpl::NotifyTimers();
 #endif
 
 #if wxUSE_SOCKETS