Added a note about error warnings to cut down on issues that should be in other implementation repos

CONTRIBUTE.md

@@ -7,6 +7,8 @@ There are many ways to contribute to IPFS development. This document will flesh
 
 If you find an error or have a suggestion for the overall design of IPFS, please submit an [Issue](https://github.com/ipfs/ipfs/issues/new).
 
+If you an error with an [implementation](README.md#implementations), file an issue in the respective repository. If you have an issue with the abstracted design, you can also check [specs](https://github.com/ipfs/specs). This repository is a landing repository for IPFS in general, and where any big updates will be posted.
+
 ### Help with the implementations
 
 Please contribute to the various [implementations](README.md#implementations) under development, or start another!