added bare table_create and table_drop (c.f. Issue #46)
added regression/46.yaml
changed 0 to NULL
added bare table_list and updated .proto docs
Merge branch 'next' into 46_bare_tablecreate
implements top level table functions for PY and JS
Merge remote-tracking branch 'origin/next' into 46_bare_tablecreate
fixed arity.yaml for ruby