Largely rewrote and refactored the help system.

The help entry database structure has changed! You have to resync or purge
your database or your will get problems!

New features:
* Help entry access now fully controlled by evennia permissions
* Categories for each help entry
* All entries are created dynamically, with a See also: footer calculated
  after the current state of the database.
* Indexes and topic list calculated on the fly (alphabetically/after category)
* Added auto-help help entries for all default commands.
* Only shows commands _actually implemented_ - MUX help db moved into 'MUX' category
  which is not shown by default.
* More powerful auto-help markup - supports categories and permissions (and inheritance).
* Global on/off switch for auto-help, when entering production
* Auto_help_override switch for selectively activating auto-help when developing
  new commands (like the old system).
* Refactored State help system; no more risk of overwriting global help entries.
* State help now defers to main help db when no match found; makes system more transparent.
* State help entries also support categories/permissions (state categories are not
  used much though).

Other updates:
* Added more commands to the batch processor
* Many bug-fixes.

/Griatch

src/commands/search.py

@@ -146,6 +146,11 @@ def build_query(source_object, search_query, search_player, search_type,
 
 def cmd_search(command):
     """
+    search
+
+    Usage:
+      search <name>
+
     Searches for owned objects as per MUX2.
     """
     source_object = command.source_object
@@ -232,4 +237,5 @@ def cmd_search(command):
                 
     display_results(source_object, search_query)
 GLOBAL_CMD_TABLE.add_command("@search", cmd_search,
-                             priv_tuple=("objects.info")),
+                             priv_tuple=("objects.info",),
+                             help_category="Building")