Adding a simple 3x retry algorithm to XhrLoadingStrategy, and exposing it to GWT.create so users can more easily override both the AsyncFragmentLoader.LoadingStrategy and also AsyncFragmentLoader.Logger.  Also tweaked the logging, so that load failures can see what was being requested and what data arrived.

Review by: spoon

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7281 8db76d5a-ed1c-0410-87a9-c151d255dfc7
7 files changed