Ignore missing file in include_once
Ignore missing file in include_once

This uses the evil ``@`` operator to ignore ist ``Text/Template.php`` is missing.

I'm doing it this way since ``phpunit/php-text-template`` is switching to using
composers autoloader with its latest 1.2.1 release.

Keeping the ``include_once`` line but letting it fail makes this work with both
1.2.0 and 1.2.1 of the lib.

lapistano/proxy-object