Transport/D + injects: module.exports === undefined

[akidee]

Some libraries (example: underscore) are using checks whether module.exports is defined, but when I define a module with Transport/D and injects. module and exports are defined but module.exports (=== exports) is not.

require.def({ name: { injects: [ 'require', 'exports', 'module' ], factory: function (require,exports,module) { ... } } })

[akidee]

Fixed by #6