Added --configs flag

- When provided, and if it resolves to a directory, copies all PHP files
  in there to the `config/autoload/` directory of the application
  package. This allows including production settings in the deployment
  package.
Updated README with `--configs` flag

- Added `--configs` flag and help message to `build` arguments detail.
- Added note about usage of `--configs` to add production configuration to your
  deployment package.
CS fixes

- braces
Merge branch 'feature/local-config'

New feature: `--configs` switch, allowing the ability to add production configuration files to the deployment package.