update contributing.md; deny adding this list awesome-awesome-* lists

Author: dzharii

contributing.md

@@ -1,14 +1,9 @@
 # Contributing
 
-Your contributions are always welcome!
-
-## Guidelines
-
-* Create a file section if needed.
-  * Add section description.
-  * Add section title to Table of contents.
-* Search previous suggestions before making a new one, as yours may be a duplicate.
-* Add your links: `* [link-name](http://example.com/) - description`
-* If your link isn't in english, use (Lang) after the link.
-* Check your spelling and grammar.
-* Send a Pull Request.
+* Make sure you are about to post a valuable resource that belongs to this list
+* Do NOT group ++Add and --Remove changes in same PR. Make them separate pull requests
+* Use spellchecker
+* All spelling and grammar corrections are welcome (except for the rule above)
+* Fork this repo, do your edits, send the pull request
+* Feel free to create any new sections
+* Do not even try to add this repo to any awesome-awesome-* lists