#31 Filenames with apostraphe not fully supported

[Josh Ferguson]

Any time there is a filename with an apostraphe or single quote, it causes all javascript to crash. This affects exif and the slideshow.

Using str_replace("'","\'",<filenamevariable>) will fix the problem on lines 1561 (for exif) and 1585 (for slideshow) of spgm.php.