Very simple unit test framework and tests corrections

Here is a proposition for a very simple unit test framework, used for rewrite some of tests (numerous errors found).

Tests are also modified to be used under Windows (tested with the C compiler of Visual Studio 2008 Express Edition) with the help of a JScript program which computes a Makefile extension for tests (file makeTests) analysing files Makefile.am. After executing buid\win32\build.bat, one can use build\win32\buildtests.bat to build and execute all defined tests. An optionnal parameter ciould be used to build and execute one specific test defined by test_<nn> (see makeTests file).