Start on a gerrit plugin as a sub-plugin of git.

- Add a gerrit window that shows a list of changes
  and buttons to display, apply or check out
  a change.
- Uses the new Qt 5 Json API or the utils/json
  classes for Qt 4.

Tested-by: Tobias Hunger <tobias.hunger@nokia.com>
Tested-by: Orgad Shaneh <orgads@gmail.com>

Change-Id: I14c6c2c2de8f95fb785752c7319be8638b386a1e
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/coreplugin/vcsmanager.cpp

@@ -262,6 +262,15 @@ IVersionControl* VcsManager::findVersionControlForDirectory(const QString &input
     return allThatCanManage.first().second;
 }
 
+QStringList VcsManager::repositories(const IVersionControl *vc) const
+{
+    QStringList result;
+    foreach (const VcsManagerPrivate::VcsInfo *vi, d->m_vcsInfoList)
+        if (vi->versionControl == vc)
+            result.push_back(vi->topLevel);
+    return result;
+}
+
 bool VcsManager::promptToDelete(const QString &fileName)
 {
     if (IVersionControl *vc = findVersionControlForDirectory(QFileInfo(fileName).absolutePath()))