UPDATE: update README for all

Author: davidzou

README.md

@@ -7,7 +7,7 @@ You can find any useful in this challenge by flutter widgets, pattern, third pac
 
 <img src="f_001_widgets_expanded/doc/image/live.gif"/> <img src="f_002_widgets_wrap/doc/image/live.gif"/> <img src="f_003_widgets_valuelistenablebuilder/doc/image/live.gif"/> <img src="f_004_widgets_animatedcontainer/doc/image/live.gif"/>
 <img src="f_005_widgets_opacity/doc/image/live.gif"/> <img src="f_007_widgets_clippath/doc/image/clippath.png" width="148"/> <img src="f_008_widgets_pageview/doc/image/live.gif" /> <img src="f_009_widgets_directionality/doc/image/live.gif"/>
-<img src="f_011_pattern_mvc/doc/image/live.gif"/> <img src="f_014_widgets_aboutdialog/doc/image/live.gif"/> <img src="f_015_widgets_row_and_column/doc/image/live.gif"/> 
+<img src="f_011_pattern_mvc/doc/image/live.gif"/> <img src="f_012_widgets_focus_traversal_group/doc/image/live.gif" width="148"/> <img src="f_014_widgets_aboutdialog/doc/image/live.gif"/> <img src="f_015_widgets_row_and_column/doc/image/live.gif"/> 
 
 
 ## License:

f_012_widgets_focus_traversal_group/README.md

@@ -1,6 +1,6 @@
 # f_012_widgets_focus_traversal_group
 
-A new Flutter project.
+A new Flutter application for widget 'FocusTraversalGroup'.
 
 ## Getting Started