Scilab: small fix on int matrix typemap
Scilab: wrap SWIG_Init() function to initialize module SWIG types (needed for STL support)
Scilab: added target in Examples makefile for debugging
Scilab: generic support for STL containers.

STL containers are mapped in Scilab as:
- for int, double, string: matrices (of int, or double, etc....)
- for other types (like pointers on objects): list of pointers
Scilab: generic support for STL vector
Scilab: rewrite STL vector example (vector argument passing example)

Fixes:
- use generic support of vectors
- add vector of object example
- improve example messages
- simplify cpp code
- move example code to "std_vector" folder
Scilab: add STL simple vector example (available also for Python, Ruby...)
Scilab: add generic support for STL set
Scilab: update STL set example

Fixes:
- use generic support of STL set
- add example for set of string