reduce layout level
#	new file:   doc/new-layout-only-webview-reduce-level.png
#	deleted:    res/layout/tab.xml
#	modified:   src/com/android/ubrowser/BaseUi.java
#	modified:   src/com/android/ubrowser/Browser.java
#	modified:   src/com/android/ubrowser/BrowserWebView.java
#	modified:   src/com/android/ubrowser/TabControl.java
#	new file:   src/com/tools/StackTrace.java