REPL6: Load the specified editor if specified by RAKUDO_LINE_EDITOR
REPL6: Load the specified editor if specified by RAKUDO_LINE_EDITOR

Now, instead of having to rely on the built-in line-editor order
in REPL.pm, a user can specify exactly which editor they prefer,
or 'none' if they want no line editor at all.  Specifying 'none'
is also a good way to suppress the recommendations message should
that be desired

raydiak/rakudo,rakudo/rakudo,Gnouc/rakudo,tbrowder/rakudo,nbrown/rakudo,softmoth/rakudo,tbrowder/rakudo,labster/rakudo,usev6/rakudo,labster/rakudo,samcv/rakudo,MasterDuke17/rakudo,salortiz/rakudo,b2gills/rakudo,jonathanstowe/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,azawawi/rakudo,nbrown/rakudo,b2gills/rakudo,nbrown/rakudo,awwaiid/rakudo,sjn/rakudo,raydiak/rakudo,azawawi/rakudo,MasterDuke17/rakudo,tony-o/rakudo,salortiz/rakudo,salortiz/rakudo,nbrown/rakudo,nbrown/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,usev6/rakudo,rakudo/rakudo,rakudo/rakudo,raydiak/rakudo,zostay/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,tony-o/rakudo,labster/rakudo,softmoth/rakudo,usev6/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,sjn/rakudo,usev6/rakudo,softmoth/rakudo,awwaiid/rakudo,zostay/rakudo,tony-o/rakudo,samcv/rakudo,usev6/rakudo,softmoth/rakudo,zostay/rakudo,b2gills/rakudo,awwaiid/rakudo,samcv/rakudo,softmoth/rakudo,tbrowder/rakudo,awwaiid/rakudo,tbrowder/rakudo,jonathanstowe/rakudo,salortiz/rakudo,Gnouc/rakudo,azawawi/rakudo,salortiz/rakudo,tony-o/rakudo,labster/rakudo,Gnouc/rakudo,rakudo/rakudo,tbrowder/rakudo,sjn/rakudo,lucasbuchala/rakudo,b2gills/rakudo,sjn/rakudo,tony-o/rakudo,raydiak/rakudo,labster/rakudo,rakudo/rakudo,azawawi/rakudo,lucasbuchala/rakudo,jonathanstowe/rakudo,tbrowder/rakudo,rakudo/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,nbrown/rakudo,tony-o/rakudo,zostay/rakudo,samcv/rakudo,azawawi/rakudo,sjn/rakudo,MasterDuke17/rakudo,b2gills/rakudo,labster/rakudo,salortiz/rakudo,samcv/rakudo,MasterDuke17/rakudo