Merge pull request #518 from samdmarshall/key-unbinding

Key unbinding

cmd/micro/bindings.go

@@ -347,8 +347,19 @@ func BindKey(k, v string) {
 	if v == "ToggleHelp" {
 		helpBinding = k
 	}
-
+	if helpBinding == k && v != "ToggleHelp" {
+		helpBinding = ""
+	}
+	
 	actionNames := strings.Split(v, ",")
+	if actionNames[0] == "UnbindKey" {
+		delete(bindings, key)
+		if len(actionNames) == 1 {
+			actionNames = make([]string, 0, 0)
+		} else {
+			actionNames = append(actionNames[:0], actionNames[1:]...)
+		}
+	}
 	actions := make([]func(*View, bool) bool, 0, len(actionNames))
 	for _, actionName := range actionNames {
 		actions = append(actions, findAction(actionName))