PHPCS should output to terminal on validate, generate report on analyze

[grayside]

The current integration with PHPCS generates a report, and never denies a build. This means it is up to Jenkins reporting to point out problems with coding style. Reports like that are generally not useful to a developer's hourly workflow, but in-line reporting is something else.

Let's refocus the analyze task on generating reports, and the validate task on (time-efficient) terminal output.

To that end I've begun examining SaschaGalley/grunt-phpcs#20, but that PR seems broken in several ways.

[grayside]

Took a step forward on this with SaschaGalley/grunt-phpcs#31. We can use my fork (https://github.com/grayside/grunt-phpcs/tree/override-options) to unblock the work here.