Add CONTRIBUTING.md file general structure

CONTRIBUTING.md

+# CONTRIBUTING GUIDELINE
+
+1. [Luke, use the search](#luke-use-the-search)
+2. [You have a problem](#you-have-a-problem)
+3. [You have a solution](#you-have-a-solution)
+
+**BONUS:** [You have free time to volunteer](#you-have-free-time-to-volunteer)
+
+## LUKE, USE THE SEARCH
+
+May the experiences of other people be with you
+
+
+## YOU HAVE A PROBLEM
+
+See point 1, then look at FAQ or Troubleshooting wiki pages (first we'll have to make them)
+
+
+## YOU HAVE A SOLUTION
+
+See point 1, then go ahead (unless your solution is yet another theme)
+
+
+## YOU HAVE FREE TIME TO VOLUNTEER
+
+Cool!