cutting up types.hh/types.cc

[ERDI Gergo <cactus cactus rulez org>]

Murray,

Just letting you know that I've begun breaking up types.hh/types.cc into
smaller per-class source files.
I'm going to concentrate on Sequence first, so this is what I've first
moved to types-sequence.hh/.cc.

-- 
   .--= ULLA! =---------------------.   `We are not here to give users what
   \     http://cactus.rulez.org     \   they want'  -- RMS, at GUADEC 2001
    `---= cactus@cactus.rulez.org =---'
Define (n.)  De ting you get for breaking de law.