added warning message for haters

ReadMe.md

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+# this project is mostly un-maintained. i worked on this as an experiment to learn LINQ a bit better and get to write some node code. i might pick it back up later, but there are more active / better versions if you google around a bit.
+
 #JSLINQ - Perform LINQ against JSON
 ##A pure JS implementation of Microsoft's [Language Integrated Query](http://en.wikipedia.org/wiki/Language_Integrated_Query) library
 ### works in the browser or in node.js (CommonJS)