Added hook for stack install and stack remove

ee/cli/plugins/stack.py

@@ -158,6 +158,9 @@ class EEStackController(CementBaseController):
         if self.app.pargs.utils:
             EEAdminStack(package_dict=EEVariables.ee_utils).install_stack()
 
+        # Hook for stack install plugin
+        hook.run('stack_install_hook', self.app)
+
 
     @expose(help="Remove packages")
     def remove(self):
@@ -225,6 +228,8 @@ class EEStackController(CementBaseController):
         if self.app.pargs.utils:
             EEAdminStack(package_dict=EEVariables.ee_utils).remove_stack()
 
+        # Hook for stack remove plugins
+        hook.run('stack_install_hook', self.app)
 
 
     @expose(help="Purge packages")