'create mapstory' on front page work, refs #471
Update the settings file to include the mapquest Satellite Imagery
layer

This commit also makes sure that the mapquest source does not show up
in the add layer dialog
Merge branch 'master' of github.com:opengeo/mapstory
Merge pull request #497 from opengeo/fixSettingsBaseLayer

Fix settings base layer
ability to configure wms expires, refs #498

also contains batch updating for gwc layer configuration and
reworking/cleanup of code
Merge branch 'master' into integration