elifecleaner 0.37.0

Added: prc.transform_journal_title_tag(), "replace journal-title tag in xml Element with names from file transformations list"
Added: prc.transform_publisher_name_tag(), "replace publisher-name tag in xml Element with names from file transformations list"
Added: prc.transform_journal_meta_tag(), "replace the text value of a tag in the journal meta", which is called by the above two functions

Code merged in PR #97