Merge pull request #10 from terwanerik/ui-fixes

Fixed some UI issues that entered from macOS mojave / dark mode

Fixed grainy images on resize, v1.3.1

Updated zip file to v1.3.0

Improved the UpdateModel, now uses the GitHub Api to check for newer …

…versions, way better.

Refactored project, moved Window specific code into a NSWindow and up…

…date specific code to the UpdateModel

Fixed JPEG compression issue (always really low quality if lower than 10/10)

Fixed issue #5

Updated to v1.0.10 - Fixed the resizeing for non 72dpi images

v1.0.9 - Fixed 3x resizing to 1x issue on retina Macs

The 1x did not resize to 1x but rather to 2x. Now fixed.

Fixed Retina Mac resizing issue

Fixed the Retina resizing issue, also put the model related stuff into
a ResizeModel.