Expose the locale.queryparam and locale.cookie config params to client
code.  This allows things like a locale selector widget that is
automatically configured based on the module configuration.

Public review at: http://gwt-code-reviews.appspot.com/1250801/show

Review by: conroy, rjrjr, jlabanca


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9497 8db76d5a-ed1c-0410-87a9-c151d255dfc7