OP-182 Method to retrieve all settings for a given category
OP-182 Changing convention of how settings categories are discovered. Now uses preside forms rather than i18n bundles

i18n bundles are an optional part of the category, forms are a must
OP-182 Building system settings main menu based on configured categories
OP-182 rendering the edit form for a settings category
OP-182 a little robustness in the edit category handler
OP-182 Ability to save configuration form settings