Update composer.json to something I think will work.
Update composer.json to require dev deps.

It is hard to work on debugkit without cakephp and phpunit :)
Remove dead test suite classes.
Add phpunit.xml sample file.
Get test suite 'passing' again.

Skip and delete tests for features that will be removed or are broken.
There is still a ton of work to do to get the plugin finished.
Add tests for Database logger.
Fix fails on travis.
Fix a number of PHPCS errors.

Still a bunch more to do.
Allow PHPCS to fail.

It is a ways off of passing so let it fail for the time being.
Remove incorrect doc block.
Merge pull request #189 from cakephp/fix-tests

Fix tests and add tests for new sql logger