traditional Chinese localization, string extraction, icon clone and resize

1. add zh-tw for traditional Chinese Language
2. extract some hard-code string to resource file
3. clone rssi-icon to radio-icon and resize radio-icon to the same size with other menu-icon
I should take a snapshot for this visual effect. Take "hdpi" for example,  the pic resolution of ic_status_rssi is 36x36, it smaller than ic_action_circles(48x48) and etc.. It causes The menu is not alignment in the same starting position. So I cloned one, re-sized pic and replaced for menu.