Create CONTRIBUTING.md
Create CONTRIBUTING.md

initial guide
khorsmann/dsiprouter,dOpensource/dsiprouter,dOpensource/dsiprouter,dOpensource/dsiprouter,khorsmann/dsiprouter,dOpensource/dsiprouter,dOpensource/dsiprouter,khorsmann/dsiprouter,khorsmann/dsiprouter