Revert "Materials made from souls are no longer '(creature) soul soul' items."

This reverts commit e296ccdd44596c748f9570cb474d36c5eb29cb7a.
Move souls to using SOUL_TEMPLATE rather than TORCH_TEMPLATE

This also fixes materials made of souls having 'soul soul' in their names.
Thanks to @Meph248 for spotting the cause of this.

[REACTION_CLASS:SOUL] has been moved to the template.

http://www.bay12forums.com/smf/index.php?topic=134547.msg4886307#msg4886307