Important changes in v2.0.0 package

[girish]

TinyTinyRSS recently changed it's configuration mechanism. It uses environment variables instead of PHP config variables. I have therefore made a new major package version and you have to click the update button manually to upgrade. The data will migrate but if you had custom plugins, you have to do some manual migration.

• Move all your plugins into /app/data/plugins.local. Any themes should also go into /app/data/themes.local.

• To enable the plugin as a system plugin, edit /app/data/env.sh and add the variable to TTRSS_PLUGINS and restart the app.

[girish]

If the fever plugin breaks, please see https://forum.cloudron.io/topic/4882/urgent-ttrss-v2-0-0-breaks-fever-plugin/4