update README and refine look and feel

Author: Gary-Li

README.md

@@ -30,4 +30,7 @@ $ bin/hadoop jar distributed-shell-1.0-SNAPSHOT.jar com.hortonworks.simpleyarnap
 Use mvn eclipse:eclipse to generate eclipse project
 Currently this is only developed and tested in Mac os X10.9
 
+### how to test webshell
+`mvn exec:java -Dexec.mainClass=com.codeboy.dshell.webshell.WebShellServer`
 
+`http://localhost:8898/distributedshell`

src/main/resources/ApplicationMaster.html

@@ -52,10 +52,7 @@ <h3>
 				</td>
 			</tr>
 			<tr>
-				<td>=======></td>
-			</tr>
-			<tr>
-				<td><input type="text" id="shell_result" size="100"> </input></td>
+				<td><textarea id="shell_result" style="width:400px;height:400px;"> </textarea></td>
 			</tr>
 		</table>
 </body>