2.1.0

You can now create open-ended ranges which go to the earliest or latest possible date:

var rangeUntil = moment.range(null, "2011-05-05");
var rangeFrom = moment.range("2011-03-05", null);
var rangeAllTime = moment.range(null, null);

a6a609e Jeremy Forsythe: Support null as open ended range
5022bf5 Jeremy Forsythe: Add tests for open-ended ranges
aca2323 Jeremy Forsythe: Update README.md with examples for open ranges
f11230a thomasvanlankveld: Added documentation for creating a range using moment(date).range(interval)
3214a23 thomasvanlankveld: Made wording a little simpler
42ebebd Gianni Chiappetta: Add moment as a dev dependency
b75ec4e Gianni Chiappetta: Update README for npm
72e31df Gianni Chiappetta: Version bump to 2.1.0