date-fns - Package Alerts

format now returns the correct result for key E.
Prevent startOf..., endOf... and lastDayOf... functions to return dates with an incorrect time when the date is modifying into another time zone.
parse now parses years from 1 AD to 99 AD correctly.
Fix a bug in getISOWeek appearing because of a changing time zone (e.g., when the given date is in DST and the start of the ISO year is not).

BREAKING: all functions are moved to the root of the library, so they are now accessible with require('date-fns/name_of_function') or import nameOfFunction from 'date-fns/name_of_function'.
```
// Before v1.0.0
var addMonths = require("date-fns/src/add_months");

// v1.0.0 onward
var addMonths = require("date-fns/add_months");
```
BREAKING: functions that had the last optional argument weekStartsAt (i.e. endOfWeek, isSameWeek, lastDayOfWeek, setDay, startOfWeek) now instead receive the object options with the property options.weekStartsOn as the last argument.
```
// Before v1.0.0
var result = endOfWeek(new Date(2014, 8, 2), 1);

// v1.0.0 onward
var result = endOfWeek(new Date(2014, 8, 2), { weekStartsOn: 1 });
```
BREAKING: remove the function getTimeSinceMidnight that was used inside the other functions.
BREAKING: differenceInDays now returns the number of full days instead of calendar days.
BREAKING: eachDay and isWithinRange now throw an exception when the given range boundaries are invalid.
Faster isLeapYear.
Internal: make the documentation more verbose.
Internal: convert the tests from Chai to power-assert allowing them to run against IE8.