0.1.0

Changelog

1d56019 build snap packages
babef5d add goreleaser
45bc8ea README: add some illustrations
f3ac31e vendor deps + minor refactor
c1ee8cd mkdirIfNotExisting: be recursive
22b30da tileslicer: add --force
45dcdaf refactor
bd15810 README: update
d0feb2a tilecutter: specify what part to cut/keep
8cf762a nuke WritePNG, use more code from github.com/disintegration/imaging
4d75ea3 add cmd/tileflipper
291eb7a fix height calc on odd sizes
0af06be tilejoiner: fix information about generated height
3f0a344 improved usage by naming flags
750362d initial import from https://github.com/martinlindhe/roguer

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