fixed some erroneously encoded vowels
corrected all_langs value (off by one)
fixed encoded value in test
re-enabled test
removed DM Soundex values from nachnamen.bm (they weren't calculated correctly anyway)
fixed a bug in reference implementation
made debug prints optional (for now)
finalized nachnamen test & added uscensus2000 test for bmpm
fixed old bug looking for '' instead of None
added more US Census 2000 tests