add date and use standard nameing scheme for protocol and camera setup

observe_nema.html

@@ -480,9 +480,11 @@
       let to_send = {
         "nematodes" : nematodes,
         "sampleID" : sample_chooser.value,
-        "sample_prep_ID" : protocol_chooser.value,
-        "microscope_setup_ID": camera_chooser.value,
+        "prepID" : protocol_chooser.value,
+        "setupID": camera_chooser.value,
         "dilution" : dilution_chooser.value,
+        "datetime" : new Date,
+
 
       }