Time.hh - getUNIXTime(std::string yyyymmdd_hhmmss) added
FitsUtility - ifdef added to avoid redefinition of TBIT, TINT, etc...
String.hh - parseYYYYMMDD_HHMMSS(std::string yyyymmdd_hhmmss) added
Date.hh - newly added (but overlaps with Time.hh and will be merged in future)
CxxUtilities.hh - Date.hh added