unification of meta-attributes handling: * remove has_format, has_text_encoding, format, text_encoding methods on Entity * remove rich_text_fields method on EntitySchema * use instead has_metadata / meta_attribute on EntitySchema (from yams) and attribute_metadata on Entity

include *.py

recursive-include data external_resources *.gif *.png *.css *.ico *.js
recursive-include i18n *.pot *.po
recursive-include migration *.sql *.py depends.map