Changes to AsyncFragmentLoader to replace the use of Map with ArrayList.
The end result results in a linear time but with a reduction in initial code
size by ~10K.  The linear time is not likely a concern unless the resulting
application is quite large (> 100 fragments).


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7597 8db76d5a-ed1c-0410-87a9-c151d255dfc7