Found that syntax errors in scripts were giving SIGSEGV, my mistake.
* Added new helper type: rgbTuple.
This is used to represent and deal with rgb color triplets in modules
like Material and Lamp. Updated Lamp module to use it.
Partially implemented. Most of it comes from opy_nmesh.c, plus needed
changes to integrate in into exppython.
* Added helper submodule vector, needed by NMesh.
* Minor changes in other files.
* 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.
