Fixed ResizeImage() so it will scale square images correctly.
ResizeImage(): Added new parameter to specify InterpolationMode.

Also, when writing to a new file, if extension is "jpg", will now use
System.Drawing.Imaging.ImageFormat.Jpeg in the Save call which creates a
much smaller disk file than bmpOut.RawFormat
Merge Matt's Image resizing changes.

Tweak and fix ResizeImage algorithm for when square images are passed.
Update assemblies and changelog.