Added snackbar (#17)

IconButton/index.scss

@@ -1 +1 @@
-@import "~preact-material-components/IconButton";
+@import "~preact-material-components/IconButton/mdc-icon-button";

IconButton/index.ts

@@ -13,7 +13,7 @@ export interface IIconButtonState extends RIconButtonState {
 
 export class IconButton extends RIconButton {
     public readonly styles = [
-        {style, id: "button"}
+        {style, id: "icon-button"}
     ];
 
     public componentWillMount() {

Snackbar/index.scss

@@ -0,0 +1 @@
+@import "~preact-material-components/Snackbar/mdc-snackbar";

Snackbar/index.ts

@@ -0,0 +1,30 @@
+import RSnackbar, {
+    ISnackbarProps as RSnackbarProps,
+    ISnackbarState as RSnackbarState
+} from "preact-material-components/esm/Snackbar";
+import {load_styles, unload_styles} from "../util/style";
+import style from "./index.scss";
+
+export interface ISnackbarProps extends RSnackbarProps {
+}
+
+export interface ISnackbarState extends RSnackbarState {
+}
+
+export class Snackbar extends RSnackbar {
+    public readonly styles = [
+        {style, id: "snackbar"}
+    ];
+
+    public componentWillMount() {
+        load_styles(this.styles);
+    }
+
+    public componentWillUnmount() {
+        super.componentWillUnmount();
+        unload_styles(this.styles);
+    }
+}
+
+// noinspection JSUnusedGlobalSymbols
+export default Snackbar;