[PR] Local changes to get jooma-gae work on local and remote 

Hi Gary. I had to make a few changes here and there to get this working on my local/remote GAE.

For instance, there is no Memcache extension/class in my local and remote envitonments.
This makes me wonder, how different our environments are. I'll send you my phpinfo() later on for comparison.

I'm also sending a suggestion to leave the InstallationApplicationWeb intact and override JSessionStorageNone instead.

Feel free to test and comment on this PR. I haven't had chance to test everything in deep but will do soon.

Thanks