Add command locator.

Make it possible to trigger actions from the locator bar by
registering an instance of Locator::CommandLocator by prefix.
Currently used for VCS systems.

Acked-by: con
Initial-patch-by: Roberto Raggi <roberto.raggi@nokia.com>

src/plugins/git/gitplugin.h

@@ -54,7 +54,9 @@ class ICore;
 namespace Utils {
 class ParameterAction;
 }
-
+namespace Locator {
+    class CommandLocator;
+}
 namespace Git {
 namespace Internal {
 
@@ -125,6 +127,7 @@ private:
 
     static GitPlugin *m_instance;
     Core::ICore *m_core;
+    Locator::CommandLocator *m_commandLocator;
     Utils::ParameterAction *m_diffAction;
     Utils::ParameterAction *m_diffProjectAction;
     QAction *m_diffRepositoryAction;