* [Slim] Add PHP_CodeSniffer config template
* [Slim] Update doc
* [Slim] Add local configs to gitignore
PHPUnit and PHP_CodeSniffer provides the same developing pattern when
user overrides global config with local one. In local config he can
set environment variables. Official doc recommends to not commit local
config files.
* [Slim] Remove phpcsStandard CLI option
Now user have full freedom to override config file. This option is not
used and not necessary anymore.
* [Slim] Refresh samples
