Implementation of the tic-tac-toe sample.

Added some README.txt

Change-Id: Ie2703ffdfdeba773d0fd27153ec0cdb806b2e2dc
diff --git a/samples/TicTacToeLib/default.properties b/samples/TicTacToeLib/default.properties
index 4ac577c..89927d7 100755
--- a/samples/TicTacToeLib/default.properties
+++ b/samples/TicTacToeLib/default.properties
@@ -16,13 +16,13 @@
 
 # This file is automatically generated by Android Tools.
 # Do not modify this file -- YOUR CHANGES WILL BE ERASED!
-#
+# 
 # This file must be checked in Version Control Systems.
-#
+# 
 # To customize properties used by the Ant build system use,
 # "build.properties", and override values to adapt the script to your
 # project structure.
 
 android.library=true
 # Project target.
-target=android-7
+target=android-3