Version 3.0.1

Features/Changes

• Lib: add Jstable.remove (Cedric Cellier)
• Build: use recent version of jbuilder (># 1.0+beta12)

Bug fixes

• Runtime: fix Sys.file_exists for the in-memory filesystem.
• Runtime: implement missing primitives: caml_nativeint_bswap, caml_floatarray_*,
  caml_ba_change_layout
• Runtime: few other bugfixes.
• Compiler: fix compat with OCaml 4.06