Addition of ngUpload to NuGet package library, bug fixes, and feature enhancements.

A NuGet package has been created for the __ngUpload__ directive.  This package has the identity [__AngularJS.ngUpload__](https://nuget.org/packages/AngularJS.ngUpload/).

The NuGet package has jQuery and AngularJS packages, as its prerequisite, respectively. 

Resolves Issue #9, #11, and #12.