VCS: Add a way to filter out files/directories that belong to a VCS

Change-Id: I4dcbe6242cfe327e3b72d3dd550309be45e326a9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/subversion/subversionplugin.h

@@ -73,6 +73,8 @@ public:
 
     bool initialize(const QStringList &arguments, QString *errorMessage);
 
+    bool isVcsDirectory(const Utils::FileName &fileName);
+
     SubversionClient *client() const;
 
     SubversionSubmitEditor *openSubversionSubmitEditor(const QString &fileName);