Updated QuPath version to 0.5.0

[Rylern]

I added a dependency to qupath-fxtras because some functions moved there.

There is still an error on line 208-213 of Utils.java:

return new RenderedImageServer.Builder(viewer.getImageData())
                .store(viewer.getImageRegionStore())
                .renderer(viewer.getImageDisplay())
                .build();

This call now can throw an IOException, but I'm letting you handle it the way you want.

[ksugar]

I tested that it work with QuPath v0.5.0.
Thank you @Rylern for your help.