add support for 1..n parameters of the same type

[twoBirds]

Imagine:
.extend( originalObject, otherObject, otherObject ... );
// extends an object with other objects like in:
.extend( {}, { a: 1 }, { b: 2 }, { c: 3 } );
// -> { a: 1 , b: 2 , c: 3 }

I suggest:
@param {object} originalObject
@param {object} otherObject[0..] // zero indicating optional, so its 0...n other objects
@param {object} otherObject[1..3] // 1 to 3 other objects