ENH: add OSspecific/MSwindows (#1238)

src/OSspecific/MSwindows/Allwmake

src/OSspecific/MSwindows/MSwindows.C

src/OSspecific/MSwindows/MSwindows.H

src/OSspecific/MSwindows/Make/files

src/OSspecific/MSwindows/Make/options

src/OSspecific/MSwindows/cpuInfo/cpuInfo.C

src/OSspecific/MSwindows/cpuInfo/cpuInfo.H

src/OSspecific/MSwindows/cpuTime/cpuTime.H

src/OSspecific/MSwindows/cpuTime/cpuTimeFwd.H

src/OSspecific/MSwindows/fileMonitor/fileMonitor.C

src/OSspecific/MSwindows/fileMonitor/fileMonitor.H

src/OSspecific/MSwindows/fileStat/fileStat.C

src/OSspecific/MSwindows/fileStat/fileStat.H

src/OSspecific/MSwindows/memInfo/memInfo.C

src/OSspecific/MSwindows/memInfo/memInfo.H

src/OSspecific/MSwindows/printStack/dummyPrintStack.C

src/OSspecific/MSwindows/regExp/regExp.H

src/OSspecific/MSwindows/regExp/regExpFwd.H

src/OSspecific/MSwindows/signals/sigFpe.C

src/OSspecific/MSwindows/signals/sigFpe.H