Prep for hapi 8
Rename objects
Remove _core
2.0.0-pre
Changes to ext api
Update tests and marhsall typo
Remove usage of private hapi apis
code option
Server.mime
Update README.md
Fix no-path-concat linting errors when testing
Use open file descriptors to retain file between prepare and marshal phases

Also adds a 403 response for files with insufficient permissions.

Fixes #4