Plugins - Added optional configuration window

Plugins - Moved plugins to their own directory
Device providers - Added all RGB.NET device providers

src/Plugins/Artemis.Plugins.Devices.Logitech/plugin.json

@@ -0,0 +1,6 @@
+{
+  "Guid": "62a45c0c-884c-4868-9fd7-3c5987fe07ca",
+  "Name": "Logitech Devices",
+  "Version": "1.0.0.0",
+  "Main": "Artemis.Plugins.Devices.Logitech.dll"
+}