OBS: You'll need to resync/rebuild your database!

- This implements an updated, clearer and more robust access system. The policy is now to lock that which is not explicitly left open.
- Permission strings -> Lock strings. Separating permissions and locks makes more sense security-wise
- No more permissiongroup table; permissions instead use a simple tuple PERMISSIONS_HIERARCHY to define an access hierarchy
- Cleaner lock-definition syntax, all based on function calls.
- New objects/players/channels get a default security policy during creation (set through typeclass)

As part of rebuilding and testing the new lock/permission system I got into testing and debugging several other systems, fixing some
outstanding issues:
- @reload now fully updates the database asynchronously. No need to reboot server when changing cmdsets
- Dozens of new test suites added for about 30 commands so far
- Help for channels made more clever and informative.

src/utils/search.py

@@ -32,7 +32,6 @@ from src.players.models import PlayerDB
 from src.scripts.models import ScriptDB
 from src.comms.models import Msg, Channel
 from src.help.models import HelpEntry
-from src.permissions.models import PermissionGroup
 from src.config.models import ConfigValue
 
 #
@@ -136,20 +135,6 @@ channels = Channel.objects.channel_search
 
 helpentries = HelpEntry.objects.search_help 
 
-# 
-# Search for a permission group
-#  Note that the name is case sensitive.      
-#
-# def search_permissiongroup(self, ostring):
-#     """
-#     Find a permission group
-#
-#     ostring = permission group name (case sensitive)
-#               or database dbref
-#     """
-
-permgroups = PermissionGroup.objects.search_permgroup
-
 #
 # Get a configuration value
 #