parseTM does not parse fractional seconds properly

[nyej]

ParseTM parses out the fractional portion of the time stamp using a straight parseInt, causing '.5' and '.000005' to result in the same value of 5 microseconds. TM allows anywhere from 1 to 6 digits to be provided so parseTM needs to consider the actual number of digits present in the fractional component and multiply by the appropriate power of 10. Could also zero right-pad then parse but that would probably be the most expensive/wasteful option.