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/commands/cmdsethandler.py

@@ -99,7 +99,6 @@ def import_cmdset(python_path, cmdsetobj, emit_to_obj=None, no_logging=False):
                 module = __import__(modulepath, fromlist=[True])
                 cmdsetclass = module.__dict__[classname]                
                 CACHED_CMDSETS[wanted_cache_key] = cmdsetclass            
-            #print "cmdset %s found." % wanted_cache_key 
             #instantiate the cmdset (and catch its errors)
             if callable(cmdsetclass):
                 cmdsetclass = cmdsetclass(cmdsetobj) 
@@ -362,3 +361,21 @@ class CmdSetHandler(object):
         self.cmdset_stack = [self.cmdset_stack[0]]
         self.mergetype_stack = [self.cmdset_stack[0].mergetype]
         self.update()
+        
+    def reset(self):
+        """
+        Force reload of all cmdsets in handler. This should be called 
+        after CACHED_CMDSETS have been cleared (normally by @reload). 
+        """
+        new_cmdset_stack = []
+        new_mergetype_stack = [] 
+        for cmdset in self.cmdset_stack:
+            if cmdset.key == "Empty":
+                new_cmdset_stack.append(cmdset)
+                new_mergetype_stack.append("Union")
+            else:                
+                new_cmdset_stack.append(self.import_cmdset(cmdset.path))
+                new_mergetype_stack.append(cmdset.mergetype)
+        self.cmdset_stack = new_cmdset_stack
+        self.mergetype_stack = new_mergetype_stack
+        self.update()