Add the possibility to reference the package

inst/CITATION

@@ -15,3 +15,13 @@ citEntry(
       "We are in process of writing a journal paper about the package, but for now we referer to the paper 'Short-term heat load forecasting for single family houses', in which the implemented modelling is described."
   )
 )
+
+
+citEntry(
+  entry    = "Manual",
+  title    = "{{onlineforecast}: Forecast Modelling for Online Applications}",
+  author   = "Peder Bacher and Hjörleifur G. Bergsteinsson",
+  year     = "2020",
+  note     = "R package version 0.9.3",
+  url      = "https://onlineforecasting.org"
+)