Log Message:
Update to 2.1806

Upstream changes:
2.1806   2016-09-25

  [BUG FIXES}

  - A role generated on the fly (as opposed to one in a file on disk) could
    not be used as a trait. Fixed by Aaron Cohen. (RT#92089, PR#47).

  [ENHANCEMENTS]

  - When a required attribute's init_arg differs from the attribute's name, we
    now include both the attribute name and init_arg in the exception thrown
    when that attribute is not provided. (RT#116814, Gordon Fisher)

  - The unimport sub generated by Moose::Exporter can now be called with
    parameters like { into => 'Package' } or { into_level => 1 }, just like
    the import sub it generates. Requested by Dmytro Zagashev. (RT #93666).

  - Moose::Meta::Attribute objects created from role attributes keep a
    reference to the Moose::Meta::Role::Attribute which created
    them. Moose::Meta::Attribute now has ->role_attribute and
    ->has_role_attribute methods. RT #84563 and #117586. (Dave Rolsky)

  [DOCUMENTATION]

  - Updated Moose::Manual::Roles with more detail on role consumption and how
    to deal with various corner cases involving required methods, multiple
    roles, etc.