Adding alternative methods for PrintUsage(…), PrintValueInfo etc for using in Non-Console application.

[dmagician038]

More enhancement then an issue: It should not take too much time (depending on your busyness and available time) and it will make the library much more convenient for usage on Non-Console apps (e.g. WPF, WinForms or any other).

-- It is basically the same code as the original methods, but using StringBuilder instead of TextWriter...

As a side note: I've added the mentioned two alternative methods on the copied code from your repo.

(Sorry for the annoyance, but I'm not familiar with all of git abilities like pull etc [how exactly they are working]. So posting directly to you...)