Adrien Loison b4724906c4 Add support for cells formatted as time (#224)
Cells formatted as "time" have values between 0 and 1. These values used to be considered as invalid.
Note: this uses what was started in #202
2016-05-19 13:10:47 -07:00
..
2015-07-26 23:53:17 -07:00