update readme and don't ignore build stuff

Had to update the .gitignore file since the build script and uglify were
incorrectly being excluded from the project.
Added scripts to assist with ASP.Net error

These batch files will help correct an ASP.NET registration error.
Updated build.ts

Corrected the reference path to be relative to the build script itself.
Also allowed the uglification to run asynchronously.
update requirement to install uglify.js globally