Changes & Enhancements:

• IAtom marker protocol
• IReset & ISwap protocols
• ClojureScript compiler can be AOTed

Bug Fixes:

• CLJS-765: IReversible for Subvec
• CLJS-615: Warnings when library does not exist
• CLJS-767: fix (assoc [0] nil 1)
• Use catch :default in browser REPL & reflect
• Permit nodejs targets to have a preamble