Modified some elements to link to /search?... instead of /search.py?... file. Renamed get_xml to record_get_xml. Added bibformat_engine_test.py to makefile and modified it to test elements copied in /tmp dir of cds installation. Resolved circular import between search_engine, bibformat and bibformat_utils. Added create_excel function to bibformat as an example of complex formatting of multiple records. Added use_old_bibformat variable in config file to disable/enable new bibformat. Added call_old_bibformat to bibformat_engine (mostly refactoring of existing code). Parameter search_pattern of format_record (and co) function is now a list of words corresponding to parsed user search request instead of raw request string.