Version 4.0.0

Merged three PR's, courtesy of @Bazze. I decided to bump the major version because there could be some breaking changes for those of you who use inject() in your code or tests.

• #97 Halacious processing has been moved from onPreResponse to onPostHandler. This change enables response payload validation in your routes.
• #98 curie link href's now show absolute paths when absolute is set to true.
• #99 Auto-documetation rels now display correctly.

Many thanks to @Bazze!