Install PhpUnit

1. pear config-show (Check the configuration parameters are correct if not fix it by editing pear.ini file from your php folder)
2. pear channel-discover pear.phpunit.de
3. pear install phpunit/PHPUnit (it will ask for optional packages if we want we can use install pdo_sqlite ,image_graphviz etc)
4. if everything goes file you will see a PHPUnit folder on your pear directory if not check for the errors in log file