KWSys 2015-08-28 (dc3fdd7f)

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ dc3fdd7f | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' cdaf522c..dc3fdd7f
Brad King (9):
      15a16826 Remove include <kwsys/ios/*> and kwsys_ios:: compatibility layer
      a5799c17 Remove unused KWSYS_IOS_USE_{SSTREAM,STRSTREAM_H,STRSTREA_H} checks
      198957cf Remove unused KWSYS_IOS_USE_SSTREAM check
      24d2b60e Remove support for pre-C++98 streams
      2a581c30 Remove support for pre-C++98 std::string missing operators
      5f3fd465 Remove support for pre-C++98 STL
      cded1574 Remove support for pre-C++98 STL from hash_map and hash_set
      f130a3ab Remove kwsys/cstddef compatibility header
      dc3fdd7f Remove support for pre-C++98 template capabilities