Update ReadMe.txt

ReadMe.txt

 This is the Source Code package for Quanty4RIXS (dated June 2017).
-You can use it ad reditribute it to your own liking. 
-The only request I have, is that a reference to me (Patric Zimmermann) as initial author is given.
+You can use it and redistribute it to who ever finds it useful. 
+The only request I have, is that a reference to me (Patric Zimmermann) as initial author is given when the source code is copied elsewhere.
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+A corresponding paublication with some instructions is also in the making. 
 
 
 1.)