Native endian version of interfaces
Really add native endian files...
Ugly hack for OCaml 3.12: Sys.big_endian is not available
Disable NativeEndian for OCaml <= 3.12

This is safer than an ugly hack to try to detect endianness
Add unoptimized get_float, get_double, set_float and set_double to every modules.
Add CHANGES.md
Port to OCaml 4.02 -safe-string, add EndianBytes module

The Bytes module is provided by the bytes transition package,
so it is safe to port user code to EndianBytes without risk
without risk of breaking build with OCaml < 4.02.
Version 0.6
Merge pull request #6 from chambart/master

Version 0.6