Fix JS coding style to conform to WP coding standards. (See: http://make.wordpress.org/core/handbook/coding-standards/javascript/)
Improve consistency with white space in code and remove double line-breaks.
Fix code documentation to conform to WP PHP documentation standards. (See: http://make.wordpress.org/core/handbook/inline-documentation-standards/php-documentation-standards/)
Improve capitalization and punctuation in README.md.