Fixed unloading of plugins.
Mostly cosmetic fixes. Moved exceptions from agent into common ground.
A few more fixes. Renamed 'added' and 'removed' plugin methods to 'enabled' and 'disabled'.
Details. Just details.
Bugfixes.
Moar fixes.
Plugins, package.jsons, descriptions, etc.
Copy. Reverse.
Handle update from previous clients with API/Device keys on global scope.