partial bibrecord -> legacy.bibrecord
format -> formatter
tags: test tag editor
search: fixing exceptions and references
docs
utils.date: convert_datetime_to_utc_string
format --> formatter

Conflicts:
	invenio/legacy/__init__.py
	invenio/legacy/bibrecord/data/__init__.py
	invenio/modules/format/__init__.py
	invenio/modules/format/template_context_functions/__init__.py
	invenio/modules/formatter/__init__.py
	invenio/modules/formatter/template_context_functions/__init__.py
formatter: model fixes