Features/Changes
- Lib: add missing File.blob constructor (fix #630)
- Runtime: hash support for custom blocks
- Runtime: weak.js loaded by default
- Compiler: compile an OCaml program into a named javascript function (fix #599)
- Misc: move ppx_deriving_json in its own opam package (Rudi Grinberg)
- Compiler: static eval of float negation
- Compiler: improve constant sharing.
- Ppx: add support for writeonly_prop and optdef_prop in object literal.