Ta-da...! update CONTRIBUTING.md to reflect CLA
Ta-da...! update CONTRIBUTING.md to reflect CLA

phenomax/clahub,freddyrangel/clahub,clahub/clahub,step21/clahub-1,freddyrangel/clahub,phenomax/clahub,strongloop-forks/clahub,phenomax/clahub,clahub/clahub,clahub/clahub,strongloop-forks/clahub,hybridgroup/clahub,strongloop-forks/clahub,phenomax/clahub,hybridgroup/clahub,step21/clahub-1,strongloop-forks/clahub,step21/clahub-1,freddyrangel/clahub,clahub/clahub,hybridgroup/clahub,step21/clahub-1,freddyrangel/clahub