Update AnalogIODevice workflow (#49)

- New AnalogIODevice.bonsai (from Jon) saves data
- Added a Python file (from Jon) to read data

source/Software Guide/Bonsai.ONIX/Nodes/AnalogIODevice.rst

@@ -73,3 +73,8 @@ options.
       - The direction of the channel. If set to Output, the measured voltage is
         automatically looped back through the analog input.
 
+Loading Scripts
+--------------------------
+The following scripts can be used to load the data produced by this workflow in Python (using Numpy):
+
+- :download:`load-analog-data.py <../../../_static/bonsai/workflows/load-analog-data.py>` 

source/_static/bonsai/workflows/AnalogIO.bonsai

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<WorkflowBuilder Version="2.6.2"
+<WorkflowBuilder Version="2.8.1"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  xmlns:p1="clr-namespace:Bonsai.ONIX;assembly=Bonsai.ONIX"
+                 xmlns:dsp="clr-namespace:Bonsai.Dsp;assembly=Bonsai.Dsp"
                  xmlns="https://bonsai-rx.org/2018/workflow">
   <Workflow>
     <Nodes>
@@ -69,14 +70,32 @@
       <Expression xsi:type="MemberSelector">
         <Selector>Data</Selector>
       </Expression>
+      <Expression xsi:type="Combinator">
+        <Combinator xsi:type="dsp:MatrixWriter">
+          <dsp:Path>analog-data_.raw</dsp:Path>
+          <dsp:Suffix>Timestamp</dsp:Suffix>
+          <dsp:Overwrite>false</dsp:Overwrite>
+          <dsp:Layout>ColumnMajor</dsp:Layout>
+        </Combinator>
+      </Expression>
       <Expression xsi:type="MemberSelector">
         <Selector>Clock</Selector>
       </Expression>
+      <Expression xsi:type="Combinator">
+        <Combinator xsi:type="dsp:MatrixWriter">
+          <dsp:Path>analog-clock_.raw</dsp:Path>
+          <dsp:Suffix>Timestamp</dsp:Suffix>
+          <dsp:Overwrite>false</dsp:Overwrite>
+          <dsp:Layout>ColumnMajor</dsp:Layout>
+        </Combinator>
+      </Expression>
     </Nodes>
     <Edges>
       <Edge From="1" To="2" Label="Source1" />
       <Edge From="2" To="3" Label="Source1" />
-      <Edge From="2" To="4" Label="Source1" />
+      <Edge From="2" To="5" Label="Source1" />
+      <Edge From="3" To="4" Label="Source1" />
+      <Edge From="5" To="6" Label="Source1" />
     </Edges>
   </Workflow>
 </WorkflowBuilder>