style changes:
* consistent copyright/license notice formatting
* removed hardcoded name of test file (for crlf)
* added include guard to cvs_iterator.hpp
* removed now useless #includes of "boost/filesystem/exception.hpp"
* used ""-style for #includes of non standard headers
* renamed class long_name_check to file_name_check
(unfortunately we can't rename the .cpp/.hpp files)
[SVN r34848]