Merge pull request #761 from go-vgo/bitmap-pr

Add: add more const Key support

Author: vcaesar

key.go

@@ -87,16 +87,19 @@ const (
 	CapY = "Y"
 	CapZ = "Z"
 	//
-	Key0 = "0"
-	Key1 = "1"
-	Key2 = "2"
-	Key3 = "3"
-	Key4 = "4"
-	Key5 = "5"
-	Key6 = "6"
-	Key7 = "7"
-	Key8 = "8"
-	Key9 = "9"
+	Key0      = "0"
+	Key1      = "1"
+	Key2      = "2"
+	Key3      = "3"
+	Key4      = "4"
+	Key5      = "5"
+	Key6      = "6"
+	Key7      = "7"
+	Key8      = "8"
+	Key9      = "9"
+	KeyGrave  = "`"
+	KeyQuoter = '"'
+	KeyQuote  = "'"
 
 	// Backspace backspace key string
 	Backspace = "backspace"