Add blank g3_password definition to web installer (matches cli).  This prevents possible warnings downstream.
Remove references to obsolete "url_suffix" config parameter.
Revise "identity" config file specification and use.
Revise how Packager handles "database" config.
Fix Gallery_Session - $_abort_save shouldn't be static.
Revise abs_file() and abs_site() in Gallery_URL.  We may want to revisit these once we're up and running.
Merge pull request #263 from shadlaws/shad_fixes_20130402

Fixes for config, session, installer, and url