Show 'synonymous' instead of all non canonical tags

The 'noncanonical' column was showing both unfilterables and tags that have a merger (synonyms).

http://code.google.com/p/otwarchive/issues/detail?id=1891

Now there is a 'synonymous' column instead, which shows only non-canonical tags that have synonyms.

There are a lot of spacing / tabbing changes too, because I just can't parse a file unless it's properly indented. /o\