Add combined entry for neware-nda (and ndax files) (#77)

marda_registry/data/filetypes/neware-nda.yml

@@ -0,0 +1,26 @@
+---
+id: >-
+    neware-nda
+name: >-
+    Neware NDA
+description: >-
+    A binary data file used by Neware cyclers. At least two different versions 
+    exist, one with the `.nda` file extension, the other with `.ndax`.
+    From the Neware website: "NDA file is a kind of structured data file. 
+    This kind of file stores testing data and other information including 
+    steps once you scheduled and log during testing."
+associated_file_extensions:
+    - nda 
+    - ndax
+associated_vendors:
+    - Neware
+subject:
+    - electrochemistry
+    - voltammetry
+    - impedance spectroscopy
+    - potentiometry
+associated_instruments:
+    - CT-4000 series
+associated_software:
+    - Neware BTSDA
+