Expose HttpWebRequest property, ReadWriteTimeout

Allow the user to set ReadWriteTimeout...a parameter that otherwise
defaults to 5 minutes.
Expose HttpWebRequest property, ReadWriteTimout

Allow user to set ReadWriteTimeout...a parameter that otherwise default
to 5 minutes. Convert spaces to tabs for this commit.
Merge pull request #472 from josh-ak/ReadWriteTimeout

Expose HttpWebRequest ReadWriteTimeout to client