Updated module list and README.

README.md

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+# NQRduck Modules
+This repository contains a json file with different modules used for the nqrduck program. 
+It is manually maintained and updated.
+
+## Structure
+Different modules can be added to the json file `modules.json`. 
+
+Every module in the json file start with the `name` key. The value of the key is a string which is the name of the module.
+
+Additionally, the json also has the option to add a `description` for the module.
+
+A `platform` can be specified for the module. This is done by adding a `platform` key to the module. The value of the key is a string which is the platform the module is intended for. For windows, the value should be `win`. For linux, the value should be `linux`
+
+One can add a `source` for the module which can be either a link to a git repository or a simple string. 
+If the `source` is a simple string, the module is assumed to be available via PyPi.
+
+Dependencies between different nqrduck modules can be specified in the json file. This is done by adding a `dependencies` key to the module. The value of the key is a list of strings. Each string is the name of a module that the current module depends on.
+
+## Example
+Check the `modules.json` file for an example of how the json file should be structured.

modules.json

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+[
+    {
+        "name": "nqrduck-spectrometer",
+        "description": "Base module for all of the different spectrometer implementations",
+        "source": "nqrduck-spectrometer"
+    },
+    {
+        "name": "nqrduck-spectrometer-limenqr",
+        "description": "A module for control of a LimeSDR based spectrometer",
+        "platforms": [
+            "linux"
+        ],
+        "source": "nqrduck-spectrometer-limenqr",
+        "dependencies": [
+            "nqrduck-spectrometer"
+        ]
+    },
+    {
+        "name": "nqrduck-spectrometer-simulator",
+        "description": "A module for simulating magnetic resonance experiments",
+        "source": "nqrduck-spectrometer-simulator",
+        "dependencies": [
+            "nqrduck-spectrometer"
+        ]
+    },
+    {
+        "name": "nqrduck-pulseprogrammer",
+        "description": "A module for graphical pulse sequence programming",
+        "source": "nqrduck-pulseprogrammer",
+        "dependencies": [
+            "nqrduck-spectrometer"
+        ]
+    },
+    {
+        "name": "nqrduck-measurement",
+        "description": "A module for performing spectroscopy measurements",
+        "source": "nqrduck-measurement",
+        "dependencies": [
+            "nqrduck-spectrometer",
+            "nqrduck-pulseprogrammer"
+        ]
+    },
+    {
+        "name": "nqrduck-autotm",
+        "description": "A module for automatic tuning and matching of the probe coils",
+        "source": "nqrduck-autotm"
+    },
+    {
+        "name": "nqrduck-broadband",
+        "description": "A module for broadband magnetic resonance measurements",
+        "source": "nqrduck-broadband",
+        "dependencies": [
+            "nqrduck-spectrometer"
+        ]
+    }
+]