تحديث في 24/07/2015
1. Add moire test, including rgb-pixel, square, cross, cycle moire pattern;
2. Add blink-bar pattern to contrast test for legacy device;
3. Add dark-level, light-level pattern to gray-level test;
4. Add horizontal scrolling to white-rect, black-rect pattern of contrast test;
5. Fix the issue that no tip message shown when scrolling on black-bar and white-bar pattern;
