ChatSubs

2.2.3
 - removed use of deprecated functions to prepare for Cataclysm

2.2.2
 - updated TOC for WoW 3.3
 - added new <mouseover> and %o substitutions for the mouseover target

2.2.1
 - fixed handling of absent targets with new-style substitutions (i.e., they do the "everyone" now too)

2.2
 - added <text> substitution for addons using ChatSubs as a library -- what it places is determined by other addon

2.1
 - added validation function for addons using ChatSubs as a library to check whether the units for a substitution string exist

2.0
 - added new substitution string syntax
 - old syntax still works as well