Add detailed features description to Readme.md

README.md

@@ -15,6 +15,20 @@ Install via the bundled Plugin Manager or manually using this URL:
 
 https://github.com/Patronics/OctoPrint-PrinterAlerts/archive/master.zip
 
+### Features
+* Will bring up a standard alert in octoprint when the printer is waiting for your input.
+* Configurable alert severity, from "Error" and "Warning", to "Info", and "Sucess"
+* Set alerts to auto-hide, or to stay on screen
+ * Note: For printer like the Prusas that repeatedly give the same message while waiting, I strongly recommend leaving this set to Auto Close.
+* Optionally can speak the alerts as well
+
+
+### Compatibility 
+* This plugin was designed to work with the Prusa i3 Mk3s MMU2 3D printer, and will likely work with other Prusa printers as well. 
+* It will work with any non-prusa printers that output the same message "echo:busy: paused for user" when waiting for user input
+* For other printers that have a different waiting for user message, create an issue on github, and I'll be happy to try to implement it for those messages as well
+
+
 ### Changelog
 
 * Version 0.7.4 Released on 6/2/2019