function "rename_blacklist()" converts all legacy motif names such as: c100_n001_AGWWTG to MM10001_AGNNTG_CANNCT, general format of new motif names: MM<version, e.g. 1><motif id up to 4 digits, e.g. 0011>_<motif IUPAC sequence inc. ambiguity codes, e.g. AGNNTG>_<reverse complement of IUPAC sequence>