Added getPropertyNames(), which used to be unnecessary because you could get the data Object (actually a proxy to it) and do a for or for-each on that, but we removed that when we made 3 different kinds of sets.
Added getPropertyNames(), which used to be unnecessary because you could get
the data Object (actually a proxy to it) and do a for or for-each on that,
but we removed that when we made 3 different kinds of sets.


git-svn-id: a3e1eb16dde062992de22c830ed8045c8013209a@307 c613c5cb-e716-0410-b11b-feb51c14d237

threerings/vilya,threerings/vilya