KWSys 2015-07-30 (f63febb7)

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ f63febb7 | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' c9336bcf..f63febb7
Brad King (1):
      83b4a6b8 Process: Fix conversion warning in testProcess.c

James Johnston (7):
      4cd8846c Process: Remove trailing whitespace in ProcessUNIX.c
      b1c44c58 Process: Refactor sleeping code in testProcess.c.
      faff2ab0 Process: Wait for children to terminate on Ctrl+C.
      ef517b19 Process: Added initial support for process groups.
      906c2cae Process: Added test cases for testing Ctrl+C and process groups.
      52874e6a Process: Fix leaked file descriptor in ProcessUNIX
      f63febb7 Process: Fix error message for startup failure on Windows