* Cosmetic changes: commented out $exif_verbose 'min_width' and 'padding', 
	added MAKERNOTE to default $exif_verbose_ignore
* Added option to force ImageMagick; usually defaults to GD in Safe Mode, 
	even when we have made ImageMagick available.
* createThumbs() has new argument, $bCallHook, which when true will call 
	functions in $GLOBALS['genthmHook'] after generating each thumb
* Cosmetic changes: added class attribute "qdig-thumbrow" to row of thumbnails
* Modified Exif block code.  
	Displays real FocalLength in addition to 35mm equivalent
	Displays in columns (default set to 2).
	Displays elements that are arrays.  Probably best to set these to ignore.
* Cosmetic changes: added class attribute "qdig-nav" to nav row
* Cosmetic changes: added class attribute "qdig-footer" to footer row
* No longer tries to generate thumbs if included with $GLOBALS['no_qdig_body']=true;