fixing CONTRIBUTERS to have github url references
fixing CONTRIBUTERS to have github url references

apchamberlain/stubby4node,codeorganic/stubby4node,kombucha/stubby4node,kombucha/stubby4node,Droogans/stubby4node,apchamberlain/stubby4node,Droogans/stubby4node,codeorganic/stubby4node