add function (one restaurant only... with file writer to sdcard)

               by Heidfeld Wu
               on 201312181100
add function (can add more than 1 restaurants, working on storage and listview.append)

               by Heidfeld Wu
               on 201312181100
add function done. (haven't check EditText format)

               by Heidfeld Wu
               on 201312181947
add function test done. (haven't check EditText format)

               by Heidfeld Wu
               on 201312191616
fix fragment crash during screen rotation.

               by Heidfeld Wu
               on 201312191719