Fixes an issue in EnumMap where entrySet() entries would not write-through to the backing map.  Also changed the internal ArrayList to an array to make it lighter weight.  Renamed Array.clonify() to Array.createFrom().

Review by: bobv


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@2490 8db76d5a-ed1c-0410-87a9-c151d255dfc7