[spec] Rename ^isa() to get list of parents to ^parents so there's no confusion with .^isa(Foo) and consistency with .^does(Foo) and .^roles(). Also fill out the introspection specification a little more.
[spec] Rename ^isa() to get list of parents to ^parents so there's no confusion with .^isa(Foo) and consistency with .^does(Foo) and .^roles(). Also fill out the introspection specification a little more.

git-svn-id: 53605643c415f7495558be95614cf14171f1db78@26700 c213334d-75ef-0310-aa23-eaa082d1ae64

tokuhirom/specs,prammer/specs,perl6/specs,tokuhirom/specs,tokuhirom/specs,prammer/specs,perl6/specs,prammer/specs