renaming BooleanProperty to BoolProperty (rna structs shouldnt affect scripters)

Talked with Brecht and Campbell and they both agreed that bpy.types should match bpy.props
In the ideal world we would rename bpy.props to BooleanProperty. This would break scripts though. So we go for a compromise and at least have some consistency.

source/blender/python/intern/bpy_rna.c

@@ -3495,7 +3495,7 @@ static PyObject *pyrna_struct_meta_idprop_getattro(PyObject *cls, PyObject *attr
 	/* Allows:
 	 * >>> bpy.types.Scene.foo= BoolProperty()
 	 * >>> bpy.types.Scene.foo
-	 * <bpy_struct, BooleanProperty("foo")>
+	 * <bpy_struct, BoolProperty("foo")>
 	 * ...rather than returning the deferred class register tuple as checked by pyrna_is_deferred_prop()
 	 *
 	 * Disable for now, this is faking internal behavior in a way thats too tricky to maintain well. */