CLJS-770: refactor goog-style JS dependency bits into cljs.js-deps, populate :js-dependency-index in default cljs environments
CLJS-768: Fix assoc!-ing non-numeric keys into TransientVector.
Allow the language_in && the language_out option to be set for the google closure compiler
CLJS-745: Support destructuring maps with namespaced keywords

port CLJ-1138 patch to ClojureScript
bind *loop-lets* stack to ()
tests for CLJS-739
CLJS-757: Remove redundant bounds checking in PersistentVector and TransientVector.
CLJS-728: fix (get coll k) when coll is vector-like and k is non-numeric.
CLJS-772: Support :none & :whitespace optimizations under Node.js

Include nodejs.js from Closure Library. When :nodejs target and
:optimizations :none or :whitespace, emit nodejs.js to the expected
location in the output directory.