[config] remaping values into dict of value and unit

pyrelacs/config.yaml

@@ -15,7 +15,8 @@ Metadata:
 PyRelacs:
   Data:
     input:
-        inputsamplerate    : 20kHz
+        inputsamplerate    : {value: 20, unit: kHz}
+        # BufferSize
         inputtracecapacity : 600s
         inputunipolar      : false
         inputtraceid       : [ V-1, EOD, LocalEOD-1, GlobalEFieldStimulus ]
@@ -48,8 +49,7 @@ PyRelacs:
         outputtraceunit    : [ V ] 
         outputtracemaxrate : [ 40kHz ]
         outputtracemodality: [ electric ]
-      
-      
+
   Devices:
     DAQFlexCore:
       AnalogOutputPins: [0,1]
@@ -57,7 +57,6 @@ PyRelacs:
       AnalogInputPinsLow: [1,2]
       DigitalPins: [0,1,2,3]
 
-      
     CS3310DIO:
       ident     : attdev-1
       strobepin : 6