Added electric print cost calculator plugin

README.md

@@ -51,6 +51,7 @@ Third party plugins
 * [Auto orientation](https://github.com/nallath/CuraOrientationPlugin): Calculate the optimal orientation for a model.
 * [OctoPrint Plugin](https://github.com/fieldofview/OctoPrintPlugin): Send printjobs directly to OctoPrint and monitor their progress in Cura.
 * [WirelessPrinting Plugin](https://github.com/probonopd/WirelessPrinting): Print wirelessly from Cura to your 3D printer connected to an ESP8266 module.
+* [Electric Print Cost Calculator Plugin](https://github.com/zoff99/ElectricPrintCostCalculator): Calculate the electric costs of a print.
 
 Making profiles for other printers
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