Add to english lang file for select options and also add contributing.md

contributing.md

@@ -0,0 +1,6 @@
+DataTables Plugins
+==================
+
+Contributions are very welcome to this repo. Please create a pull request and/or post in the (forum)[https://datatables.net/forums] to share it with us.
+
+In the case of i18n Plugins, we ask that you don't create a pull request and instead make use of the (management system)[https://datatables.net/plug-ins/i18n/] that we have in place for this on our website.

i18n/English.lang

@@ -129,5 +129,17 @@
 		"emptyPanes": "No SearchPanes",
 		"loadMessage": "Loading SearchPanes",
 		"title": "Filters Active - %d"
+	},
+	"select": {
+		"1": "%d row selected",
+		"_": "%d rows selected",
+		"cells": {
+			"1": "1 cell selected",
+			"_": "%d cells selected"
+		},
+		"columns": {
+			"1": "1 column selected",
+			"_": "%d columns selected"
+		}
 	}
 }