Added link to issues as possible contributions

README.md

@@ -2,12 +2,8 @@ Visit page at http://warsaw.io
 
 If you want to contribute to the website, you may simply edit the code on-line.
 Any contributions are welcome. Here are some ideas:
+* Checkout [issues](https://github.com/WarsawIO/warsaw.io/issues)
 * Add missing meetups from Warsaw
 * Embed events list from crossweb
 * Suggest new layout
 * Propose what other information you'd see here
-
-Main contributors:
-* [Leszek Krupiński](https://github.com/leafnode)
-* [Wojtek Erbetowski](https://github.com/wojtekerbetowski)
-