document project hook directories

Author: dhellmann

docs/source/projects.rst

@@ -31,6 +31,22 @@ site, combine the :ref:`templates-bitbucket` and
 
     $ mkproject -t bitbucket -t django my_site
 
+Project Hook Files
+==================
+
+The project directory can include additional hook files for the
+`postactivate` and `predeactivate` hooks. Placing hook scripts in the
+project hook directory, `.virtualenvwrapper`, allows them to be
+checked into version control and shared more easily.
+
+When the :ref:`scripts-postactivate` hook runs, it looks for
+`.virtualenvwrapper/postactivate` within the project directory and if
+it is found it sources the file.
+
+When the :ref:`scripts-predeactivate` hook runs, it looks for
+`.virtualenvwrapper/predeactivate` within the project directory and if
+it is found it sources the file.
+
 .. seealso::
 
    * :ref:`extensions-templates`