rst bge touch ups: making the title of the examples slightly more noticeable

-  it's still not correct, comparing to the other examples, but at least it looks okish.
-  fixed some small typos

doc/python_api/examples/bge.constraints.py

@@ -1,6 +1,6 @@
 """
 Basic Physics Constraint
-++++++++++++++++++++++
+++++++++++++++++++++++++
 Example of how to create a hinge Physics Constraint between two objects.
 """
 from bge import logic

doc/python_api/examples/bge.texture.1.py

@@ -1,6 +1,6 @@
 """
-Texture replacement
-++++++++++++++++++++++
+Texture Replacement
++++++++++++++++++++
 Example of how to replace a texture in game with an external image.
 createTexture() and removeTexture() are to be called from a module Python
 Controller.

doc/python_api/examples/bge.texture.py

@@ -1,6 +1,6 @@
 """
 Basic Video Playback
-++++++++++++++++++++++
+++++++++++++++++++++
 Example of how to replace a texture in game with a video. It needs to run everyframe
 """
 import bge

doc/python_api/rst/bge.constraints.rst

@@ -5,6 +5,11 @@ Physics Constraints (bge.constraints)
 .. module:: bge.constraints
 
 .. literalinclude:: ../examples/bge.constraints.py
+   :language: rest
+   :lines: 2-4
+
+.. literalinclude:: ../examples/bge.constraints.py
+   :lines: 6-
 
 .. function:: createConstraint(physicsid, physicsid2, constrainttype, [pivotX, pivotY, pivotZ, [axisX, axisY, axisZ, [flag]]]])
 

doc/python_api/rst/bge.texture.rst

@@ -37,8 +37,18 @@ When the texture object is deleted, the new texture is deleted and the old textu
 .. module:: bge.texture
 
 .. literalinclude:: ../examples/bge.texture.py
+   :language: rest
+   :lines: 2-4
+
+.. literalinclude:: ../examples/bge.texture.py
+   :lines: 6-
 
 .. literalinclude:: ../examples/bge.texture.1.py
+   :language: rest
+   :lines: 2-6
+
+.. literalinclude:: ../examples/bge.texture.1.py
+   :lines: 8-
 
 .. class:: VideoFFmpeg(file [, capture=-1, rate=25.0, width=0, height=0])
 

doc/python_api/rst/bge.types.rst

@@ -954,7 +954,7 @@ Game Types (bge.types)
 
       .. deprecated:: use :data:`localPosition` and :data:`worldPosition`.
 
-      :type: :class:`mathurils.Vector`
+      :type: :class:`mathutils.Vector`
 
    .. attribute:: orientation