Added hook functions that will be overridden for taggable behavior.
Added hook functions that will be overridden for taggable behavior.

sanyaade-mediadev/Catool,sanyaade-mediadev/Catool,Harvard-ATG/Catool,sanyaade-mediadev/Catool,Harvard-ATG/Catool,Harvard-ATG/Catool,Harvard-ATG/Catool,sanyaade-mediadev/Catool