Change the image uploader we built so that it preserves the original aspect ratio. Replaces lines in the foreach($sizes) loop. Prevents up-sampling

image-preserve-aspect-ratio.php

if($width >=  $pixels){
    //wider than desired size
    $newwidth = $pixels;
    //calculate the correct height
    $newheight=($height/$width) * $newwidth;
}else{
    //smaller than desired size. preserve original width and height
    $newwidth=$width;
	$newheight=$height;
}
$tmp_canvas = imagecreatetruecolor($newwidth,$newheight);
imagecopyresampled($tmp_canvas,$src,0,0,0,0,$newwidth,$newheight,$width,$height);