Bug fixes, suggestion implementation, and examples.

* Multiple form submission.
* Form submission using HTML elements other than input[type=submit].
* Configurable option for enabling/disabling form submission controls
Ignore visual studio solution files to make nodejs app deployable.
Include the express module for azure deployment.
Code restructuring and more samples.

* Now 3 projects. (a main and 2 example projects)
* Example projects added for ASP.Net MVC and NodeJS.
* Other minor refactoring to the directive.
* Module name changed from 'ng-upload' to 'ngUpload' for consistency with the directive name.
Samples and more usage scenario added.
Merge pull request #3 from adebisi-fa/master

Bug Fixes and Suggestions Implementation