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

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include *.py

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recursive-include data external_resources *.gif *.png *.css *.ico *.js

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recursive-include i18n *.pot *.po

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recursive-include migration *.sql *.py depends.map