The following updates have been contributed by Willian P. Germano:

* Implemented BPY_end_python function.
* Implemented error handling. This results in rerunning a script after an
  error has occurred. No need to restart blender anymore.
* Camera module supports dir()
* variable assignment now calls the Python equivalent function - this has
  type checking and should be safer now.
* Implemented the Lamp module. Used the Camera module as a template.
* Implemented the Image module.
* Added EXPP_ClampFloat and EXPP_intError functions to gen_utils.[ch]
* Implemented 'constant' object.

source/blender/python/api2_2x/gen_utils.h

@@ -38,6 +38,8 @@ char * GetIdName (ID *id);
 PyObject * PythonReturnErrorObject (PyObject * type, char * error_msg);
 PyObject * PythonIncRef (PyObject *object);
 char * event_to_name(short event);
+float EXPP_ClampFloat(float value, float min, float max);
+int EXPP_intError(PyObject *type, char *error_msg);
 
 /* The following functions may need to be moved to the respective BKE or */
 /* DNA modules. */