Replace CRLF line endings with only LF

Some files have Windows line endings, what is against ZF coding standards and may also make git complaining on unix machines:

    warning: CRLF will be replaced by LF in Zend/Http/Header/SetCookie.php.
    The file will have its original line endings in your working directory.

This PR is result of:

    find tests/ library/ -type f -name "*.php" -exec dos2unix {} \;

See the diff without whitespaces to be sure this change is just what it should be: https://github.com/OndraM/zf1/commit/29e3d8d28d18ee3cf951ef1b415f5377c669d7f4?w=1