Rename all at_before/after hooks to at_pre/post. Old names still work but are deprecated. Resolves #1454.

docs/source/Howto/Coding-FAQ.md

@@ -35,12 +35,12 @@ for more info.
 **Q:** How does one keep a character from using any exit, if they meet a certain condition? (I.E. in
 combat, immobilized, etc.)
 
-**A:** The `at_before_move` hook is called by Evennia just before performing any move. If it returns
+**A:** The `at_pre_move` hook is called by Evennia just before performing any move. If it returns
 `False`, the move is aborted. Let's say we want to check for an [Attribute](../Components/Attributes.md) `cantmove`.
 Add the following code to the `Character` class:
 
 ```python
-def at_before_move(self, destination):
+def at_pre_move(self, destination):
     "Called just before trying to move"
     if self.db.cantmove: # replace with condition you want to test
         self.msg("Something is preventing you from moving!")

docs/source/Howto/Starting/Part3/A-Sittable-Object.md

@@ -36,7 +36,7 @@ This requires a change to our Character typeclass. Open `mygame/typeclasses/char
 class Character(DefaultCharacter):
     # ...
 
-    def at_before_move(self, destination):
+    def at_pre_move(self, destination):
        """
        Called by self.move_to when trying to move somewhere. If this returns
        False, the move is immediately cancelled.
@@ -49,7 +49,7 @@ class Character(DefaultCharacter):
 ```
 
 When moving somewhere, [character.move_to](evennia.objects.objects.DefaultObject.move_to) is called. This in turn
-will call `character.at_before_move`. Here we look for an Attribute `is_resting` (which we will assign below)
+will call `character.at_pre_move`. Here we look for an Attribute `is_resting` (which we will assign below)
 to determine if we are stuck on the chair or not.
 
 ## Making the Chair itself

docs/source/Howto/Tutorial-Aggressive-NPCs.md

@@ -81,14 +81,14 @@ This room checks the typeclass of objects entering it (using `utils.inherits_fro
 contents and inform any `NPCs inside by calling their `at_char_entered` method.
 
 You'll also see that we have added a 'look' into this code. This is because, by default, the
-`at_object_receive` is carried out *before* the character's `at_after_move` which, we will now
+`at_object_receive` is carried out *before* the character's `at_post_move` which, we will now
 overload.  This means that a character entering would see the NPC perform its actions before the
 'look' command. Deactivate the look command in the default `Character` class within the
 `typeclasses.characters` module:
 
 ```python
     # Add this hook in any blank area within your Character class.
-    def at_after_move(self, source_location):
+    def at_post_move(self, source_location):
         """
         Default is to look around after a move 
         Note:  This has been moved to Room.at_object_receive