VCS: Add id to IVersionControl

... and all derived classes

src/plugins/cvs/cvscontrol.cpp

@@ -34,6 +34,8 @@
 #include "cvsplugin.h"
 #include "cvssettings.h"
 
+#include <vcsbase/vcsbaseconstants.h>
+
 #include <QtCore/QFileInfo>
 
 using namespace CVS;
@@ -49,6 +51,11 @@ QString CVSControl::displayName() const
     return QLatin1String("cvs");
 }
 
+QString CVSControl::id() const
+{
+    return QLatin1String(VCSBase::Constants::VCS_ID_CVS);
+}
+
 bool CVSControl::isConfigured() const
 {
     const QString binary = m_plugin->settings().cvsCommand;

src/plugins/cvs/cvscontrol.h

@@ -47,6 +47,7 @@ class CVSControl : public Core::IVersionControl
 public:
     explicit CVSControl(CVSPlugin *plugin);
     QString displayName() const;
+    QString id() const;
 
     bool managesDirectory(const QString &directory, QString *topLevel = 0) const;