iWidth is an integer representing the new outerWidth in pixels (including scroll bars, title bars, etc).
iHeight is an integer value representing the new outerHeight in pixels (including scroll bars, title bars, etc).
When we call window.open, the width and height are the internal window/document width and height.
window.resizeTo includes all browser chrome as well. Ugh.
Yahoo handles resizing things automatically, but we need this for Google and Hotmail.
Resize based on outer window size. Fixes issue #58