Update README.md

Peter Milo · Peter Milo · commit 4548e3a14eb3 · 2015-05-03T19:39:40.000-04:00
diff --git a/README.md b/README.md
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 Extended Parts for KSP Realiam Overhaul
 
 Preview verson 15_5_3_1
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+REALISM OVERHAUL IS REQUIRED. THIS PACK IS NOT COMPATIBLE WITH STOCK KSP.
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+Licence CC BY 3.0 US
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+https://creativecommons.org/licenses/by/3.0/us/
