File Release Notes and Changelog

- Various improvements in the asm fast path for i686 and x86_64
- PR#1034: support for static linking of GMP/MPIR
- PR#1046: autodetection of ocamlopt and dynlink
- PR#1048: autodetection of more platforms that we support
- PR#1051: support architectures with strict alignment constraints for 64-bit integers (e.g. Sparc)
- Fixed 1-bit precision loss when converting doubles to rationals
- Improved support for the forthcoming release 4.00 of OCaml