change the date parsing format

[john-guerra]

It would be nice to support dates as a different data type

[jgmurillo10]

It will be required d3.time to help parsing the date. The expected behaviour will be something like:

var stringDateFormat = "%Y%m%d"; // using d3 stantard format
navio.addDateAttrib([name], stringDateFormat);

And underneath use var parser = d3.timeParse(format);

[john-guerra]

I would rather have it such that the user has to parse the date themselves