#108 Use hash instead of name in plugins.json

I suggest when storing data about plugins in plugins.json it should store the hash of the file instead of the name. This is better for security, as if the file is changed it will not be automatically run. With this the plugin name should be added to the info dictionary so the plugin name is still accessible.

It is good to also have a hash. But I guess it should have the name too. Since people need to be able to find and edit the JSON file manually.