Added a basic mutable interface IList

0.6

Completed IList tests.

Initial fully working version, just added the license... to the composer!

0.5.1.1

Added license to the package

Initial fully working version, just added the license.

0.5.1

Added license

Initial fully working version

It's fully working version, yet, some methods are missing, here's a list of missing methods so far:

// public function takeWhile();
// public function skipWhile();
// public function sum();
// public function average();
// public function aggregate();

There surely are more, but for now I'll stick to those ones.