Update custom_plugins.rst

add a description to show a foreign key relation in the edit mode of a plug in. May be i am wrong but i didn't found a other way to show the relation in the inline admin.
post release version bump
Dynamic template directory
Add tests for custom template dir
Add documentation
Improve template checking system
Improve tests checking actual template loading and for badly placed templates directory
Add support for site-enabled CMS_TEMPLATES_DIR
Removed references to 'meta_keywords' since it was removed in 3.x
Switch to module-based templates dir configuration. This allow for easier translation of template names.
Update documentation
If JavaScript sends empty string as the language parameter when re-ordering, use language from the plugin
Pin selenium version
Merge pull request #3195 from yakky/test/selenium_py3

Damn the torpedoes full speed ahead
Pin selenium version
Merge branch 'develop' of https://github.com/kater169/django-cms into kater169-develop
Fix #3189, get_plugins_for_page didn't resolve inherited template the right way
Fix formatting issues
Merge pull request #3187 from jsma/develop

Removed references to 'meta_keywords' since it was removed in 3.x
Update custom_plugins.rst

tiny typo
Merge pull request #3196 from yakky/feature/fix_plugin_rst

Update custom_plugins.rst