Notify user when no channel.xml is found

[saltybeagle]

$> php -d phar.readonly=0 pearscs.phar release /home/moacir/programming/php/phd-full/trunk/PhD-1.1.0.tgz moacir

PHP Fatal error:  Call to a member function saveRelease() on a non-object in phar:///home/moacir/programming/php/docweb/pearscs.phar/PEAR2_SimpleChannelServer-0.1.0/php/PEAR2/SimpleChannelServer/CLI.php on line 225

In this case, the channel was not found. When executing release package.tgz, notify the user if the channel was not found. SCS should display an error like, "Error, I don't know where the channel is. Either pass the path to the channel.xml file, or cwd to the root of the channel"