Migrating to new snap package

The cavestory snap package has been replaced by the nxengine-evo package.

To install the new package, run:

sudo snap install nxengine-evo

To migrate your settings and save files, you need to run nxengine-evo at least once. Then you can run the following:

# Warning: this will override existing settings (if any) in `nxengine-evo`
rm -r ~/snap/nxengine-evo/current/.local/share/nxengine
cp -r ~/snap/cavestory/current/.local/share/nxengine \
   ~/snap/nxengine-evo/current/.local/share/nxengine

To remove the old package, run:

sudo snap remove cavestory