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

#!/bin/sh

rm -f web/test/tmpdb*
rm -f web/tali18n.py

rm -f applications/*/test/tmpdb*
rm -f applications/*/tali18n.py
rm -f applications/*/i18n/*_full.po
rm -f applications/*/data/Schema.dot