adding contributing.md to root

CONTRIBUTING.md

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+# Issues & Bugs
+
+Thanks for reporting an issue with NodeBB! Please follow these guidelines in order to streamline the debugging process. The more guidelines you follow, the easier it will be for us to reproduce your problem.
+
+In general, if we can't reproduce it, we can't fix it!
+
+## Try the latest version of NodeBB
+
+There is a chance that the issue you are experiencing may have already been fixed.
+
+## Provide the NodeBB version number and git hash
+
+You can find the NodeBB version number in the Admin Control Panel (ACP), as well as the first line output to the shell when running NodeBB
+
+``` plaintext
+info: NodeBB v0.5.2-dev Copyright (C) 2013-2014 NodeBB Inc.
+info: This program comes with ABSOLUTELY NO WARRANTY.
+info: This is free software, and you are welcome to redistribute it under certain conditions.
+info: 
+info: Time: Tue Oct 07 2014 20:25:20 GMT-0400 (EDT)
+```
+
+If you are running NodeBB via git, it is also helpful to let the maintainers know what commit hash you are on. To find the commit hash, execute the following command:
+
+``` bash
+$ cd /path/to/my/nodebb
+$ git rev-parse HEAD
+```
+
+If you have downloaded the `.zip` or `.tar.gz` packages from GitHub (or elsewhere), please let us know.