Fixed compilation for MSVC
Added platform.h and other fixes for MSVC
Added cast to keep MSVC happy
Merge pull request #252 from hintjens/master

Fixed compilation for MSVC
update simple Makefile.mingw32
Merge pull request #254 from pijyoi/master

update simple Makefile.mingw32
close file before delete
Merge pull request #255 from pijyoi/master

close file before delete
Added support for symbolic links to zfile

* This was used by FileMQ and previously implemented in the fmq_file class
  that zfile is based on.

* A symbolic link is a 1-line text file ending in ".ln" and lets you work
  with large files by manipulating small symlink files. It eliminates the
  need for copying, in some use cases.
Merge pull request #256 from hintjens/master

Added support for symbolic links to zfile
Added restat functionality to be compatible with FileMQ

* The previous behaviour was to automatically restat on every accessor
  method, which is simple, but makes it impossible to compare old and
  new states by using two zfile objects.

* Accessor methods now do not call zfile_restat() any longer. Caller
  must do this explicitly when needed.

* Updated test case for this.
Merge pull request #257 from hintjens/master

Added restat functionality to be compatible with FileMQ