Extending Date objects to add easier manipulation capabilities.

This is a mixin for Date objects, adding methods that allow users to add or subtract pieces of date (years, months, etc).

var date = new Date();
asMathableDate.call(date);
date.addDay(42);

addYear(amount : int)
addMonth(amount : int)
addDay(amount : int)
addHour(amount : int)
addMinute(amount : int)
addSecond(amount : int)
addMillisecond(amount : int)

Testing is done via Jasmine in browser. In console:

$ bower install

Then access [asMathableDate root]/test/core/index.html