created composer.json

fixes #4
Added category for custom sniff
Merge pull request #6 from gsherwood/issue-5

Added category for custom sniff
removed tabs rule, see https://github.com/yiisoft/yii2/issues/2747
upd ruleset for psr-2
Merge pull request #10 from AlexGx/master

upd ruleset for psr-2
Merge pull request #9 from schmunk42/master

removed tabs rule, see https://github.com/yiisoft/yii2/issues/2747
remove space rules exclusion
Merge pull request #11 from AlexGx/master

remove space rules exclusion
Removed incorrect PhpStorm config
Update README.md