Merge SOC2009_FSWATCHER branch into trunk.

Merges everything from the branch with only some minor changes, mostly renamed
wxUSE_FSWATCHER_{INOTIFY,KQUEUE} to wxHAS_{INOTIFY,KQUEUE}.

Add wxFileSystemWatcher and related classes.

Also introduces wxEventLoopSource.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62474 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/fswatcherg.cpp

@@ -0,0 +1,22 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        generic/fswatcherg.cpp
+// Purpose:     wxPollingFileSystemWatcher
+// Author:      Bartosz Bekier
+// Created:     2009-05-26
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Bartosz Bekier <bartosz.bekier@gmail.com>
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#if wxUSE_FSWATCHER
+
+#include "wx/fswatcher.h"
+
+#endif // wxUSE_FSWATCHER