add time() function to create time object
add time() function to create time object

Examples:
time("2016-04-06")
time("2016-04-06T10:00:00Z")
time("2016-04-06T10:00:00+09:00")
time(2016,4,6)
time(2016,5,6,10,0,0)
time(2016,5,6,10,0,0,0,"Z")
time(2016,5,6,10,0,0,0,"+900")

matz/streem,matz/streem