Critical Bug Fix Release v1.5.3

-Fixed a bug related to the global offset of each image, leading to many montages having clipped edges or layers that simply did not appear in the montage. (Thank you to Ms. Cava and Ojukwu, as well as @asalmon91, for the heads up.)

-Added version alerts, so that the user can know upon loading that their version is behind the currently released version with a simple message box.