add rh_values() method and test for it
update MANIFEST
move test to sl_panda.t and remove sl_panda1.t
Revert "move test to sl_panda.t and remove sl_panda1.t"

This reverts commit fa65e7c037c13fe98aa44a5788c67831b5441ec2.
added closures needed to test rule_closure() with ASF traverser
refactor registrations initialization code to init_registrations()
first cut at rule_closure()
Work on rule_closure(): t+
First implementation and test of rule_closure(): t+
using rule_closure() in pruning_traverser(): t+
rh_values() used in full traverser: t+
closure call touchup
full_traverser() now uses rule_closure() and rh_values(): t+
remove Data::Dumper
remove unneeded references to penn_tag()
remove located_traverser() test duplicated in sl_panda.t
remove penn_tag() altogether: traversers use rule closures instead now:t+
comments and touchups
Merge pull request #93: rh_values()

Merge branch 'add_rh_values_to_ASF' of github.com:rns/Marpa--R2 into rns-add_rh_values_to_ASF
Reverting t/sl_null_example.t from Github pull request #93