bug of lastest_readings_from_all_devices list

[dijkstra1930]

For csv

17020003,1382624808000,null,519.0
17000008,1382624808000,null,527.0
d087d478,1382624596000,null,532.0
17a1a03d,1382623352000,null,551.0
17030009,1382624511000,null,529.0
4bd17cfe,1382624055000,null,531.0
1100e4b8,1382624189000,null,530.0
17a632b3,1382624053000,null,532.0

• no CSV field names as first line - should be "device_id,timestamp,sensor_type,value"
• 3rd field always "null", should be "temp" in this case, or omitted like below
• first field sometimes the device_id (= "URI" ?), sometimes some guid?

?? is "uri"="device_id" = "id"

For json

[{"timestamp":1382625219000,"value":521,"device_id":"17010003"},{"timestamp":1382625219000,"value":519,"device_id":"17010003"}

• here is it says "device_id",
• does not include the "sensor_type"
• doc says it should include sensor_type:
  {"timestamp":1368568889000,"sensor_type":"temp","value":515,"device_id":"10170204"}]

Probabaly should include the sensor_type in both cases, or "value" could be "temp" , because I could imagine a future request to retrieve a set of sensors in one call, sort of like:

• http://einstein.sv.cmu.edu/lastest_readings_from_all_devices/temp&light/json

This would be more consistent with other commands, like the sensor post command, which uses {"id": <"device_id">, "timestamp": <"timestamp">, <"sensor_type">: <"sensor_value">} )

[In the code we can add more than one sensor type and value in a single line, like

{"id": 17001002, "timestamp": nnnnnnn, "temp": "512", light: 10} )

This should be documented with example and corrected. It says "in json file .." it should be "json string"...