Add CONTRIBUTING file
Add CONTRIBUTING file

Adds an initial attempt to help steer people on how to help.
rocknsm/rock,rocknsm/SimpleRock,rocknsm/SimpleRock,rocknsm/rock,spartan782/rock,CyberAnalyticDevTeam/SimpleRock,spartan782/rock,CyberAnalyticDevTeam/SimpleRock,spartan782/rock,rocknsm/SimpleRock,CyberAnalyticDevTeam/SimpleRock,rocknsm/rock