Converted to dzil
Added mattn as contributer in the docs
Use 'modern' Exporter.pm
Updated Changes for dzil switch
Also support GNU/kFreeBSD
Grouped OSes in defines
Support mmap+write as fallback option

This is currently naive and will fail on large(>2GB) files on 32 bit
architectures, patches welcome.
Return written bytes on partial success on bsdish
Fixup tests
v0.12

          Switched to Dist::Zilla
          Also support GNU/kFreeBSD