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/NMesh.c

@@ -26,7 +26,7 @@
  * This is a new part of Blender, but it borrows all the old NMesh code.
  *
  * Contributor(s): Willian P. Germano, Jordi Rovira i Bonet, Joseph Gilbert,
- * Bala Gi, Alexander Szakaly, Stephane Soppera, Campbell Barton
+ * Bala Gi, Alexander Szakaly, Stephane Soppera, Campbell Barton, Ken Hughes
  *
  * ***** END GPL/BL DUAL LICENSE BLOCK *****
  */
@@ -275,6 +275,10 @@ If name is not specified a new empty mesh is\n\
 returned, otherwise Blender returns an existing\n\
 mesh.";
 
+static char M_NMesh_GetNames_doc[] = "\
+() - Get a list with the names of all available meshes in Blender\n\n\
+Any of these names can be passed to NMesh.GetRaw() for the actual mesh data.";
+
 static char M_NMesh_GetRawFromObject_doc[] =
 	"(name) - Get the raw mesh used by a Blender object\n\n\
 (name) Name of the object to get the mesh from\n\n\
@@ -2140,6 +2144,19 @@ static PyObject *M_NMesh_GetRaw( PyObject * self, PyObject * args )
 	return new_NMesh( oldmesh );
 }
 
+static PyObject *M_NMesh_GetNames(PyObject *self)
+{
+	PyObject *names = PyList_New(0);
+	Mesh *me = G.main->mesh.first;
+
+	while (me) {
+		PyList_Append(names, PyString_FromString(me->id.name+2));
+		me = me->id.next;
+	}
+
+	return names;
+}
+
 /* Note: NMesh.GetRawFromObject gets the display list mesh from Blender:
  * the vertices are already transformed / deformed. */
 static PyObject *M_NMesh_GetRawFromObject( PyObject * self, PyObject * args )
@@ -2394,6 +2411,8 @@ static int unlink_existingMeshData( Mesh * mesh )
 {
 	freedisplist( &mesh->disp );
 	EXPP_unlink_mesh( mesh );
+	if( mesh->dvert )
+		free_dverts( mesh->dvert, mesh->totvert );
 	if( mesh->mvert )
 		MEM_freeN( mesh->mvert );
 	if( mesh->medge ) {
@@ -2876,6 +2895,8 @@ static struct PyMethodDef M_NMesh_methods[] = {
 	MethodDef( GetRaw ),
 	MethodDef( GetRawFromObject ),
 	MethodDef( PutRaw ),
+	{"GetNames", (PyCFunction)M_NMesh_GetNames, METH_NOARGS,
+		M_NMesh_GetNames_doc},
 	{NULL, NULL, 0, NULL}
 };