Fixed changelog - separated 6.2.4 changes from 6.2.3
Fixed incorrect default arguments to the new gsub DogTag
* Added Yu'lon's Barrier to the DamageShield equivalency.
TMW.generateGUID(length) is now immune to local collisions for any length greater than 8 (and global collisions are extremely improbable at this length)
Simplified the code for TMW.generateGUID() a bit.
Cleaned up some messy settings table indexing
Removed tags from the dogtags suggestion list that shouldn't be there (gsub and strmatch)
Rune icons will now behave properly when no runes are found that match the types configured for the icon.
Revised the GUID generator to use only printable characters