PHP CodeSniffer fixes
Merge pull request #12 from tersmitten/php-codesniffer-fixes

PHP CodeSniffer fixes
Update composer.json

Add installer-name
Move class variable to top of class
Mark output as Shell::VERBOSE level

This is useful when we have hundreds of thousands cache files which
can be common in production sites.
Show summary of cleaned files/groups in NORMAL level
README: Added some information of the `-v` option
Merge pull request #14 from rchavik/verbosity

Shell output