update php_codesniffer dependency

ref #112
Merge pull request #113 from antograssiot/master

update php_codesniffer dependency
Bump version and update changelog.
Add max version for PHP_CodeSniffer.
Update gitignore
Resolve undetected if ( $foo ) spaces
Merge pull request #114 from dereuromark/master-psr2

Resolve undetected if ( $foo ) spaces
Merge branch 'master' into 2.0

Conflicts:
	composer.json