v2.5.0

This minor release includes the following features:

• Policies specified in the router that begin with ? are considered optional, and will not halt the loading of the application if not found.
• Application auto-loads request validators for express-validator from app/validators directory.
• Application auto-loads request sanitizers for express-validator from app/sanitizers directory.

This release also includes bug fixes and the following enhancements:

• Switched to using a Promise for lazying-loading policies