#45: Get system time using GetSystemTimeAsFileTime on Windows and gettimeofday on POSIX
 #45: Fix macro to correct type for member variable
#45: Update to newer igtlInt32 and make casts explicit
#45: Use igtl::GetTimeUTC to retrieve system time
#45: Remove redundant code
#45: Formatting for readability
#45: Fix minor compile errors in Windows
#45: Initialise TimeStamp to zero
Merge branch '45-time-stamp-windows' of https://github.com/NifTK/OpenIGTLink into 45-time-stamp-windows
ENH: Merge NifTK-45-time-stamp-windows
Merge branch 'NifTK-45-time-stamp-windows'