New scripts:

- hotkeys, obdatacopier and renameobjectbyblock, all from Jean-Michel Soler (jms);
- bevel_center by Loic Berthe, suggested for inclusion by jms;
- doc_browser, by Daniel Dunbar (Zr)

  Thanks to them for the new contributions!

  (I included doc_browser at 'Misc' because only users interested in script writing would actually use it, but it could also be under 'Help'.  Opinions?)

BPython related:
- Added scriptlink methods to object, lamp, camera and world.
- Object: added object.makeTrack and object.clearTrack (old track method).
- sys: made sys.exists(path) return 0 for not found; 1 for file, 2 for dir and -1 for neither.
- doc updates and fixes.
- made ONLOAD event work.  G.f's SCENESCRIPT bit was being zeroed in set_app_data.
- Blender: updated functions Load and Save to support the builtin importers and exporters besides .blend (dxf, videoscape, vrml 1.0, stl, ...)
- Draw: added mouse wheel events.
- Scene: added scene.play to play back animations (like ALT+A and SHIFT+ALT+A).  Makes a good counter, too, when the 'win' attribute is set to a space that doesn't "animate".

The scene.play() addition and the fix to ONLOAD scriptlinks is part of the work for a Blender demo mode.  It already works, but I'll still add support for Radiosity calculations and fix a thing in main(): it executes onload scripts too early (BIF_Init), giving funny results in alt+a animations and renderings when firing up Blender.  Loading after the program is up has no such problems.  When I finish I'll post examples of demo mode scripts.

source/blender/python/api2_2x/doc/Scene.py

@@ -3,7 +3,7 @@
 """
 The Blender.Scene submodule.
 
-B{New}: scriptLink methods: L{Scene.getScriptLinks}, ...
+B{New}: L{Scene.play}, scriptLink methods: L{Scene.getScriptLinks}, ...
 
 Scene
 =====
@@ -219,3 +219,24 @@ class Scene:
     @type event: string
     @param event: "FrameChanged", "OnLoad" or "Redraw".
     """
+
+  def play (mode = 0, win = '<VIEW3D>'):
+    """
+    Play a realtime animation.  This is the "Play Back Animation" function in
+    Blender, different from playing a sequence of rendered images (for that
+    check L{Render.RenderData.play}).
+    @type mode: int
+    @param mode: controls playing:
+        - 0: keep playing in the biggest 'win' window;
+        - 1: keep playing in all 'win', VIEW3D and SEQ windows;
+        - 2: play once in the biggest VIEW3D;
+        - 3: play once in all 'win', VIEW3D and SEQ windows.
+    @type win: int
+    @param win: window type, see L{Window.Types}.  Only some of them are
+        meaningful here: VIEW3D, SEQ, IPO, ACTION, NLA, SOUND.  But the others
+        are also accepted, since this function can be used simply as an
+        interruptible timer.  If 'win' is not visible or invalid, VIEW3D is
+        tried, then any bigger visible window.
+    @rtype: bool
+    @return: 0 on normal exit or 1 when play back is canceled by user input.
+    """