[AspNet] Massive overhaul, in progress

* Cleaned and reorganized the codebase
* Moved ASP.NET unit test into separate assembly
* Removed automatic translation of C# project/file templates to other languages
* Removed build-time updating of Web Forms CodeBehind
* Removed unmaintained remote deployment system
* Use NuGet references in project templates
* Updated ASP.NET MVC templates to ASP.NET MVC 5
* Merged ASP.NET and ASP.NET MVC addins
* Added support for ASP.NET MVC in Web App projects
* Updated default doctypes to HTML5

Incomplete:
* Stetic is no longer used for UI panels
* Added automatic updating of WebForms CodeBehind on save