Error Parser second alpha release (version 0.3.0).

From a master XML file, the parser is able to generate most of the ingredients needed by software projects to manage error codes (header file, documentation, code to retrieve the error messages).

This release adds support for multiple languages (for error messages and error documentation), proper documentation of the XML DTDs (and more) and packaging (RPM and Inno Setup).

And, just like the previous release, the parser is able to generate the header file for errors with comments for the doxygen program - the parser will also generate the code used to access the error messages.