add weather sample

samples/weather_test.lua

@@ -0,0 +1,17 @@
+function on_alarm()
+    weather:get_by_hour()
+end
+
+function on_weather_result(tab)
+    local tab2 = {}
+
+    for k,v in pairs(tab) do
+        table.insert(tab2, time_to_string(v.time)..": "..v.temp)
+    end
+
+    ui:show_lines(tab2)
+end
+
+function time_to_string(time)
+    return os.date("%c", time)
+end