Improved hook implementation doc block error detection.
Issue #1519442 by TravisCarden, klausi: Add sniff for @return void.
Issue #2146275 by blauerberg, JordanDukart: Drupal Coder Review Sniffer UI fails with PHP_CodeSniffer 1.5 Release.
Issue #2159567 by Darren Oh, klausi: Private class members are allowed now and should not throw warnings.
Issue #2135201 by TravisCarden: Don't impose line length limit on @see directives.
Disabled "line declaring an array spans longer than 80 characters..." sniff.
Disabled missing param/return type sniffs.