rename clj_ds to clj_lang
java.util like Interface Hierchary. changes in clj_lang to implements those Interfaces.
Fix PersistentSet Interface.
add java idiomatic consAll / disjoinAll methods.
TransientVector interface clj-ds; changes in clj-lang for compatibility.
TransientSet interface in clj-ds; changes in clj-lang for compatibility.
TransientMap interface in clj-ds; changes in clj-lang for compatibility.