Added initial postgres schema .
Added index on principal_groups. Changed permission_id type to bigserial. Inserted default permissions. Minor reformatting of sql.
Updated acl_entry to store a permission mask.
Removed permissions. Clean up.
Merge branch 'master' into postgres_support
Removed group information from schema.
Minor table rename and formatting.
Added indexes to secure resource table. Minor naming changes. Removed bad FK reference.
Updated license info.
Repository support for postgres.
Merge branch 'postgres_support'