added run method to execute yii commands
fixed formatting
removed composer autoloading, since it's already active
added parsing of anonymous params
added configuration file detection from composer.json (extra.config), path cleanup
Merge commit 'fbada2e8486d2367921158865e765ab42f50c10f' into extensions-composer
added line-break after message
refactored param parsing
Merge commit 'caf9948c5428025ab9a2914930ebc67f763c4fdd' into extensions-composer
added full display of command
Merge pull request #357 from schmunk42/extensions-composer

added run method to execute yii commands