Update README.md.
Remove `setStandard` from PhpCodeSniffer, add more generic `setOption`.

Add excludeFromTravis phpunit test group, and add back the functional test suite
to the Travis CI run.
Remove the Helper class and start using CLImate.

Also converts PhpCodeSniffer logs to a warning level.

Add CLImate as a required dependency.
Merge pull request #25 from sjparkinson/feature/CLImate-intergration

Remove the Helper class and start using CLImate
Merge pull request #26 from sjparkinson/develop

Release 3.0.0