* thesli/laravel-jade-engine-package#1 fix few syntax/typo in README.md

Fix few syntax errors in the README.
 1. incorrect indentation of jade. (also re-indent the HTML output)
 2. the ending `]` was missing in `routes.php`

p.s. the mixing tabs and spaces style is kept unchanged, it may need a further enhancement.

Please kindly have a review. Thanks.