Temporary files should not be placed into home directory

[worron]

The $XDG_CACHE_HOME (~/.cache default) or $XDG_DATA_HOME (~/.local/share default) suit it much better. Not a big deal but still would be nice to fix. Seems related to #615.

Thanks.

[vsch]

I think a solution that will please everyone is to add configuration that you can change. The plugin will use its current defaults but if you change it then it will use whatever you provide.