Add back Scroll & Stitch strategy

Author: glibas

src/main/java/com/assertthat/selenium_shutterbug/core/Shutterbug.java

@@ -149,6 +149,8 @@ public static PageSnapshot shootPage(WebDriver driver, ScrollStrategy scroll, in
             case WHOLE_PAGE:
                 pageScreenshot.setImage(browser.takeScreenshotEntirePage());
                 break;
+            case WHOLE_PAGE_SCROLL_AND_STITCH:
+                pageScreenshot.setImage(browser.takeScreenshotEntirePageDefault());
         }
         return pageScreenshot;
     }

src/main/java/com/assertthat/selenium_shutterbug/utils/web/ScrollStrategy.java

@@ -9,5 +9,5 @@
  * Created by Glib_Briia on 17/06/2016.
  */
 public enum ScrollStrategy {
-   VIEWPORT_ONLY, WHOLE_PAGE
+   VIEWPORT_ONLY, WHOLE_PAGE, WHOLE_PAGE_SCROLL_AND_STITCH
 }