added handling more formats

# TimeCols=	1: default, date and time are together in 1 column
#			0: date and time are in 1 column in Unix time format
#			2: date and time are in 2 separate columns
#			3: date is in yyymmdd format, where yyy is counted from 1900

Issues: Option 2 is aimed to take in intraday data.  It reads in data correctly and best handles them.  However, due to tstamps being declared not to include intraday time, this function looks to further amendment in TimeArray interface.