BPython: bug fixes / patches from trackers

(excuse me for not committing earlier)

Patches by Ken Hughes (thanks for all bug fixes!):

1) Setting a scene's MapOld and MapNew values in python does nothing:
bug #2566 submitted by Dominic Agoro-Ombaka (dmao):
https://projects.blender.org/tracker/?func=detail&aid=2566&group_id=9&atid=125
patch #2571:
https://projects.blender.org/tracker/index.php?func=detail&aid=2571&group_id=9&atid=127

2) Calling the file selector after setting the progress bar crashes Blender:
bug #2418 submitted by Alessandro Garosi (brandano):
https://projects.blender.org/tracker/?func=detail&aid=2418&group_id=9&atid=125
patch #2568:
https://projects.blender.org/tracker/index.php?func=detail&aid=2568&group_id=9&atid=127

3) Menus always generate same event when canceled:
bug #2429 submitted by Campbell Barton:
https://projects.blender.org/tracker/?func=detail&aid=2429&group_id=9&atid=125
patch #2579:
https://projects.blender.org/tracker/?func=detail&aid=2579&group_id=9&atid=127

4) Add a vertex to a mesh with groups using a script and then edit that mesh hangs blender:
bug #2211 reported by German Alonso Tamayo (servivo):
https://projects.blender.org/tracker/index.php?func=detail&aid=2211&group_id=9&atid=125
patch #2580
#https://projects.blender.org/tracker/index.php?func=detail&aid=2580&group_id=9&atid=127

About bug #2033, I'm still looking at it, committing a small fix now.

=====

Patches by Campbell Barton (thanks!):

#2482: BGL pydocs fix broken links
https://projects.blender.org/tracker/index.php?func=detail&aid=2482&group_id=9&atid=127

#2426: Large text in Draw.Text and Draw.GetStreingWidth
https://projects.blender.org/tracker/index.php?func=detail&aid=2462&group_id=9&atid=127

#2521: scene.getActiveObject()
https://projects.blender.org/tracker/index.php?func=detail&aid=2521&group_id=9&atid=127

#2523: NMesh.GetNames()
https://projects.blender.org/tracker/index.php?func=detail&aid=2523&group_id=9&atid=127

- docs also updated

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

@@ -3,9 +3,12 @@
 """
 The Blender.NMesh submodule.
 
-B{New}: edges class (L{NMEdge}) and nmesh methods (L{NMesh.addEdge},
-L{NMesh.addEdgesData}, etc.); new optional arguments to L{NMesh.update};
-L{NMesh.transform}.
+B{New}:
+ - edges class (L{NMEdge}) and nmesh methods (L{NMesh.addEdge},
+L{NMesh.addEdgesData}, etc.);
+ - new optional arguments to L{NMesh.update};
+ - L{NMesh.transform};
+ - L{GetNames}.
 
 Mesh Data
 =========
@@ -135,6 +138,14 @@ def GetRaw(name = None):
       - () - A new (empty) NMesh object.
   """
 
+def GetNames():
+  """
+  Get a list with the names of all available meshes in Blender.
+  @rtype: list of strings
+  @return: a list of mesh names.
+  @note: to get actual mesh data, pass a mesh name to L{GetRaw}.
+  """
+
 def GetRawFromObject(name):
   """
   Get the raw mesh data object from the Object in Blender called I{name}.\n