Scilab: fix li_std_vector & ignore_template_constructor test case

fix: return a runtime error for not supported type containers
Merge branch 'gsoc2012-scilab' of https://github.com/swig/swig into gsoc2012-scilab
Scilab: fix usage text
Scilab: git ignore generated files
Scilab: add build verbosity level (ilib_verbose) option
Scilab: Example makefile accepts Scilab specific options
Scilab: fix test case clean
Merge pull request #71 from smarchetto/gsoc2012-scilab

Merge, fix makefiles, and add build verbosity level