Log Message:
Update to 2.1605

Upstream changes:
2.1605   2016-02-16

  [DOCUMENTATION]

  - Fixed references to test files that were renamed when their associated
    documentation files were renamed in 2.0500 (RT#111898)

  - Moose::Manual::Roles now contains a section on handling required
    attributes in role application (thanks, Kent Fredric!)

  - a few other, very minor, documentation fixes