add sencha.io to image tag and remove width/height attributes

gistfile1.aw

add_filter( 'get_image_tag', 'secundo_get_image_tag', 10 );
add_filter( 'image_send_to_editor', 'secundo_get_image_tag', 10 );
// Genesis framework only
add_filter( 'genesis_get_image', 'secundo_get_image_tag', 10 );

function secundo_get_image_tag( $html, $id, $alt, $title, $align, $size ) {

	list( $img_src, $width, $height ) = image_downsize( $id, $size );
	$class = 'align' . esc_attr( $align ) . ' size-' . esc_attr( $size ) . ' wp-image-' . $id;
	$class = apply_filters( 'get_image_tag_class', $class, $id, $align, $size );

	$html = '<img src="http://src.sencha.io/' . esc_attr( $img_src ) . '" alt="' . esc_attr( $alt ) . '" title="' . esc_attr( $title ) . '" class="' . $class . '" />';

	return $html;
}