Added sample apps

Took me a while to figure out how to use your code, then was not satisfied with the recommended way of authenticated and created also an alternative project using WebView. Both are demonstrated in two sample apps, read more in my version of README.md.
The modifications to your code are minimal, only added:

    public HttpResponse followRedirects(boolean follow)

method to HttpResponse class.

Greg
The files located under the ".idea" directory seem to be unnecessary for this commit because they are IntelliJ specific configuration files. I think the directory needs to be added to .gitignore if possible.