fix: replace hardcoded 'html' as template directory Template directory is now determined by loading the config file from the tracker home and using the template setting. Also fixed error message when polib import fails to indicate extraction is only from thml templates.

def audit_html_files(db, cl, nodeid, newvalues):
    if 'type' in newvalues and newvalues['type'] == 'text/html':
        newvalues['type'] = 'text/plain'
    

def init(db):
    db.file.audit('set', audit_html_files)
    db.file.audit('create', audit_html_files)