title: Error when running PHPUnit
body: <p>I get the following error when I try to run <code>phpunit .</code> from within my project's tests folder:</p>
  
  <pre><code>PHP Fatal error:  Call to undefined method PHP_CodeCoverage_Filter::getInstance() in /usr/share/php/PHPUnit/Framework.php on line 46
  </code></pre>
  
  <p>I installed PHPUnit via these commands:</p>
  
  <pre><code>sudo pear channel-discover pear.symfony-project.com
  sudo pear channel-discover components.ez.no
  sudo pear install --alldeps phpunit/PHPUnit
  </code></pre>
  
  <p>As none of the other methods seem to work, including <code>apt-get</code>.</p>
  
  <p>I <em>think</em> CodeCoverage changed their singleton pattern at some point in time and hence removed <code>getInstance</code> but I don't know how to fix this error. How can I either downgrade CodeCoverage or upgrade PHPUnit? </p>
  
  <p>I tried manually installing the latest versions of everything via the following commands:</p>
  
  <pre><code>sudo apt-get install git
  mkdir phpunit &amp;&amp; cd phpunit
  git clone git://github.com/sebastianbergmann/phpunit.git
  git clone git://github.com/sebastianbergmann/dbunit.git
  git clone git://github.com/sebastianbergmann/php-file-iterator.git
  git clone git://github.com/sebastianbergmann/php-text-template.git
  git clone git://github.com/sebastianbergmann/php-code-coverage.git
  git clone git://github.com/sebastianbergmann/php-token-stream.git
  git clone git://github.com/sebastianbergmann/php-timer.git
  git clone git://github.com/sebastianbergmann/phpunit-mock-objects.git
  git clone git://github.com/sebastianbergmann/phpunit-selenium.git
  git clone git://github.com/sebastianbergmann/phpunit-story.git
  git clone git://github.com/sebastianbergmann/php-invoker.git
  sudo cp -r dbunit/PHPUnit /usr/share/php/
  sudo cp -r php-code-coverage/PHP /usr/share/php/
  sudo cp -r php-file-iterator/File /usr/share/php/
  sudo cp -r php-invoker/PHP /usr/share/php/
  sudo cp -r php-text-template/Text /usr/share/php/
  sudo cp -r php-timer/PHP /usr/share/php/
  sudo cp -r php-token-stream/PHP /usr/share/php/
  sudo cp -r phpunit/PHPUnit /usr/share/php/
  sudo cp -r phpunit-mock-objects/PHPUnit /usr/share/php/
  sudo cp -r phpunit-selenium/PHPUnit /usr/share/php/
  sudo cp -r phpunit-story/PHPUnit /usr/share/php/
  sudo cp -r phpunit/phpunit.php /usr/share/php/
  </code></pre>
  
  <p>But that didn't help any. Now I just have a bunch of junk all over the place :\</p>
  
  <hr>
  
  <p>Version info:</p>
  
  <pre><code>PEAR Version: 1.9.4
  PHP Version: 5.3.6-13ubuntu3.3
  Zend Engine Version: 2.3.0
  PHPUnit 3.6.9 by Sebastian Bergmann.
  </code></pre>
  
  <hr>
  
  <pre><code>Installed packages, channel pear.phpunit.de:
  ============================================
  Package            Version State
  File_Iterator      1.3.1   stable
  PHPUnit            3.6.9   stable
  PHPUnit_MockObject 1.1.1   stable
  PHP_CodeCoverage   1.1.1   stable
  PHP_Invoker        1.1.0   stable
  PHP_Timer          1.0.2   stable
  PHP_TokenStream    1.1.2   stable
  Text_Template      1.1.1   stable
  </code></pre>