Addressed that NotifyErrorAttribute

always returns NotFound 404 result.
Addressed the invalid exception type.
Addressed to email if any exception is thrown.
Showed error messages for invalid model state.
Showed a result of the build action on a web page.
Addressed the unused using drective.
Addressed unpacking TfsBuildException.
Addressed showing exception messages

thrown from build command
Refactored the Build action method.
Addressed UnauthorizedException

thrown from the build action method.
Improved the error message.
Incremented minor version

in order to indicate that this is the first release.