Make extract email function available in templates

ckanext/odsh/plugin.py

@@ -333,6 +333,7 @@ class OdshPlugin(plugins.SingletonPlugin, DefaultTranslation, DefaultDatasetForm
           'odsh_extract_error': helpers_odsh.odsh_extract_error,
           'odsh_extract_error_new': helpers_odsh.odsh_extract_error_new,
           'odsh_extract_value_from_extras': helpers_odsh.odsh_extract_value_from_extras,
+          'extract_email': helpers_odsh.extract_email,
           'odsh_create_checksum': helpers_odsh.odsh_create_checksum,
           'presorted_license_options': helpers_odsh.presorted_license_options,
           'odsh_has_more_facets': helpers_odsh.odsh_has_more_facets,