basic build for geofence is working

still need to merge the correct branch from niels' geofence repository onto our geofence submodule
updated geofence submodule
added geofence configuration
updated geofence submodule to include removal of ldap configuration properties so that config can provide it
added docs and a couple of files I forgot
some fixes for the geofence build.

I had the ldap properties being added to geoserver instead of geofence.  In order to add to geofence I added a new module that addes them.
updated submodule reference
updated geofence module
update geofence config
Add proxy rule for geofence
update geofence
Merge add_geofence into master
Merge remote-tracking branch 'origin/master'