Changes from 16/12/2014.
Changelog:
2014.12.16:
- Changed the FD_SETSIZE check (introduced in version 2014.12.11) so that it's not done
  in Windows (because in Windows, FD_SETSIZE has different semantics).
  (Thanks to Deanna Earley for reporting this.)
Merge pull request #44 from lshl/master

Changes from 16/12/2014.