Add maintenance note

mloskot · mloskot · commit 2f34e04277a7 · 2015-12-02T10:21:05.000+01:00
diff --git a/README.md b/README.md
@@ -1,6 +1,13 @@
 JSON Benchmark
 ==============
 
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+**NOTE: This benchmark is not actively maintained has been superseded by Milo's [Native JSON Benchmark]**
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 Simple benchmark for a number of **C++** **JSON** libraries.
 
 List of currently measured libraries: 
