update v #
open-tamil tutorial : http://ezhillang.wordpress.com/2014/01/26/open-tamil-text-processing-%E0%AE%89%E0%AE%B0%E0%AF%88-%E0%AE%AA%E0%AE%95%E0%AF%81%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%BE%E0%AE%AF%E0%AF%8D%E0%AE%B5%E0%AF%81/ published originally as a web blog
v-.2.3
tafilter - remove cruft
basic comparison routine + all_tamil() predicate
lexicographic sort for UTF8-Tamil