add hostingpackages api doc

- add to docs/code.rst toctree
- add new docs/code/hostingpackages.rst containing the autodoc directives
- document undocumented code in hostingpackages app
- update translation templates

docs/code.rst

@@ -16,6 +16,7 @@ administrators and customers.
    code/gvacommon
    code/dashboard
    code/domains
+   code/hostingpackages
    code/managemails
    code/mysqltasks
    code/osusers

docs/code/hostingpackages.rst

@@ -0,0 +1,24 @@
+:py:mod:`hostingpackages` app
+=============================
+
+.. automodule:: hostingpackages
+
+:py:mod:`admin <hostingpackages.admin>`
+---------------------------------------
+
+.. automodule:: hostingpackages.admin
+   :members:
+
+
+:py:mod:`apps <hostingpackages.apps>`
+-------------------------------------
+
+.. automodule:: hostingpackages.apps
+   :members:
+
+
+:py:mod:`models <hostingpackages.models>`
+-----------------------------------------
+
+.. automodule:: hostingpackages.models
+   :members: