Add more concepts and fix namespace

Added

• Concept interfaces:
  • ForwardedParameters
  • LinkRelations
  • Preferences
  • RangeUnits
  • TransferCodings

Fixed

• Namespace

1.1.0

Added

• More concept classes:
  • AuthenticationSchemes
  • CacheDirectives
  • ContentCodings
  • RequestMethods

Initial release

1.0.0

[main] Initial implementation