Merge pull request #4 from chambart/master

Fixes issue #3 bump version to 0.5
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.