Fix encoding of RoomTemp and State as number instead of string

The current script generates the RoomTemp and State as strings and not numbers. This can cause problems when using the data for graphing.

Example:
```
{"c":[{"v":"Date(2014,4,4,0,0,50)"},{"v":20.19},null,null,{"v":20.0},null,null,{"v":"20.13"},{"v":"0"}]},
{"c":[{"v":"Date(2014,4,4,0,0,51)"},{"v":20.19},null,null,{"v":20.0},null,null,{"v":"20.13"},{"v":"0"}]},
{"c":[{"v":"Date(2014,4,4,0,2,51)"},{"v":20.19},null,null,{"v":20.0},null,null,{"v":"20.13"},{"v":"0"}]},
```
Note that the first two number values (BeerTemp and FridgeTemp) are without quotes while RoomTemp and State do have quotes.