added check date in checkAndSetDefaultValue, because moment.js 2.10.3+ now return "Invalid date"
added check date in checkAndSetDefaultValue, because moment.js 2.10.3+ now return "Invalid date"

longbill/jquery-date-range-picker,dsgraham/jquery-date-range-picker,dsgraham/jquery-date-range-picker,fede91it/jquery-date-range-picker,fede91it/jquery-date-range-picker,longbill/jquery-date-range-picker