BibFormat: -added another backward-compatibility layer (old format used if new one not found) -'import' issue fixed (due to temporary recursive imports of bibformat and search_engine during migration phase) -fixed other minor issues (unnecessary escapes of chars, verification of given parameters in functions, etc.) BibFormat utils: -highlight() function now uses create_basic_search_units() of search_engine(). Ignore cases. -implemented get_contextual_content() function Template and element files: -various minor adjustments and bug fixes Search_engine: -can call new BibFormat -added 'search_pattern' and 'uid' param to some methods, for contextual formatting. BibReformat: -completed and corrected implementation of calls to new BibFormat.