Added description and examples for Imagick::setImageDelay() and Imagick::setImageTicksPerSecond()

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Provided by anonymous 33522 (Danack@Basereality.com)

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@331913 c90b9560-bf6c-de11-be94-00142212c4b1