Hashtable -> HashMap
The one regularly used is now called HashMap. It can have keys of simple
flash datatypes, as well as objects that implement Hashable.
HashObjectMap has the ability to use nearly any object as a key, but
pays a price for it and should be avoided unless you need it.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4591 542714f4-19e9-0310-aa3c-eee0fc999fb1