Added Readme.md for release of version 1.01.00

Readme.md

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+# Purpose, Description
+
+This is the flux calculator component of the IOW ESM.
+All coupling fields that are communicated between atmospheric and bottom models are passed through or calculated by this component.
+The commnuicated information is mapped from the models' grid to the exchange grid and vice versa. 
+
+
+# Authors
+
+* SK      (sven.karsten@io-warnemuende.de)
+* HR      (hagen.radtke@io-warnemuende.de)
+
+
+# Versions
+
+## 1.01.00 (latest release)
+
+| date        | author(s)   | link      |
+|---          |---          |---        |
+| 2022-05-31  | SK          | [1.01.00](https://git.io-warnemuende.de/iow_esm/components.flux_calculator/src/branch/1.01.00)     | 
+
+<details>
+
+### changes
+* flux calculator can now run in parallel
+* each flux calculator instance is responsible only for a small part of the exchange grid
+    
+### dependencies
+* OASIS3-MCT libraries
+* see build scripts for more dependencies  
+  
+### known issues
+* none so far
+
+### tested with
+* intensively tested on both HLRN machines
+  * using example setups available under:
+    (coupled) /scratch/usr/mviowmod/IOW_ESM/setups/
+              MOM5_Baltic-CCLM_Eurocordex/example_8nm_0.22deg/1.00.00
+* can be built and run on Haumea but output is not intensively tested
+  
+</details>
+
+## 1.00.00 
+
+| date        | author(s)   | link      |
+|---          |---          |---        |
+| 2022-01-28  | SK, HR      | [1.00.00](https://git.io-warnemuende.de/iow_esm/components.flux_calculator/src/branch/1.00.00)       | 
+
+<details>
+
+### changes
+* initial release
+* flux calculator can couple MOM5 ocean model and CCLM atmospheric model
+* usinf the input file `flux_calculator.nml` it can create a namcouple file that is used by the OASIS3 coupler
+    
+### dependencies
+* OASIS3-MCT libraries
+* see build scripts for more dependencies  
+  
+### known issues
+* none so far
+
+### tested with
+* intensively tested on both HLRN machines
+  * using example setups available under:
+    (coupled) /scratch/usr/mviowmod/IOW_ESM/setups/
+              MOM5_Baltic-CCLM_Eurocordex/example_8nm_0.22deg/1.00.00
+* can be built and run on Haumea but output is not intensively tested
+  
+</details>