mention FCC copy dll in readme (#201)

Author: tonyhallett

README.md

@@ -9,7 +9,7 @@ or download from [releases](https://github.com/FortuneN/FineCodeCoverage/release
 Prerequisites
 
 Only that the test adapters are nuget packages.  For instance, the NUnit Test Adapter extension is not sufficient.
-
+FCC will copy your test dll and dependencies to a sub folder this may affect your tests.
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 Introduction