Add the optional Ruby Language Support to the ZOO-Kernel with an API similar to the Python ZOO-API. Small rewrite of Python support. Fix issue #86 and #87. Add usid in [lenv] section, this value is used to generate an unique identifier based on time and the process identifier. This usid is now used to name the stored result or the mapfile generated. Remove *some* warning messages displayed at compilation time.

git-svn-id: http://svn.zoo-project.org/svn/trunk@453 4b6b6ad6-68b3-4dcc-9231-bd9b83bc5dc3