@azuravian: I can put this plugin in the "
Index of plugins" if & when you are ready for that. The index will link to this thread. Once in that index your plugin will be offered by calibre's plugin install/update mechanism, which offers the zip file in the first post of the thread. It is up to you to change the attachment when you make a new version.
I will need the summary info text you want in the index. If you want donations then I also need the appropriate link.