Use Composor as a dependency manager
Made library password_hash a dependency

Provides compatibility for the function `password_hash`, introduced in
PHP 5.5 for PHP >= 5.3.7.
Switched to PHP's function password_hash which is more secure
Merge branch 'security'

Switched to PHP's function password_hash which is more secure. This
requires PHP >= 5.3.7

Closes #1