move to user guide

docs/dev_guide.rst

@@ -12,7 +12,6 @@ Developer's Guide
    dev_guide/chado
    dev_guide/custom_modules
    dev_guide/custom_field
-   dev_guide/field_permissions
    dev_guide/custom_data_loader
    dev_guide/custom_web_services
    dev_guide/tutorials

docs/user_guide.rst

@@ -13,6 +13,7 @@ User's Guide
    user_guide/learn_chado
    user_guide/content_types
    user_guide/example_genomics
+   user_guide/field_permissions
    user_guide/mviews
    user_guide/searching
    user_guide/job_management