fix scroller, soundjs and youtube definitions

scroller/easyscroller.d.ts

@@ -6,7 +6,7 @@
 
 /// <reference path="scroller.d.ts"/>
 
-class EasyScroller  {
+declare class EasyScroller  {
     constructor (content: any, options: ScrollerOptions);
 
     render(): void;

scroller/scroller-tests.ts

@@ -41,7 +41,7 @@ function test_canvas() {
 function test_domlist() {
     var container = document.getElementById("container");
     var content = document.getElementById("content");
-    var refreshElem = <HTMLCanvasElement>content.getElementsByTagName("div")[0];
+    var refreshElem = content.getElementsByTagName("div")[0];
     var scroller = new Scroller(render, {
         scrollingX: false
     });

scroller/scroller.d.ts

@@ -28,7 +28,7 @@ interface ScrollValuesWithZoom extends ScrollValues {
     zoom: number;
 }
 
-class Scroller {
+declare class Scroller {
     constructor (callback: (left: number, top: number, zoom: number) => void , options: ScrollerOptions);
 
     setDimensions(clientWidth: number, clientHeight: number, contentWidth: number, contentHeight: number): void;

soundjs/soundjs.d.ts

@@ -10,7 +10,7 @@
     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-module createjs {
+declare module createjs {
     export class FlashPlugin {
         // properties
         static BASE_PATH: string;

youtube/youtube.d.ts

@@ -4,7 +4,7 @@
 // Updated by: Ian Obermiller <http://ianobermiller.com>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-module YT {
+declare module YT {
     interface EventArgs {
         target: Player;
         data: any;
@@ -148,5 +148,5 @@ module YT {
         ENDED,
         PAUSED,
         PLAYING
-    };
+    }
 }