Provide Types as npm Package

[ghost]

Description

Currently there is no package for the types, it would be wonderfull if you can create one.

Expected Behavior

A package with the type definitions.

Current Behavior

There is no package.

Context

Currently developing a ng2 application against commercetools api and the package would be wonderfull for model definitions.

[daern91]

references #329

cc @skyriakou