added several comments to index to make it easier to follow as a new collaborator.
added several comments to index to make it easier to follow as a new collaborator.

WWUCBE/cbe-calc,WWUCBE/cbe-calc,wesleyvankomen/cbe-calc,wesleyvankomen/cbe-calc,WWUCBE/cbe-calc,WWUCBE/cbe-calc,wesleyvankomen/cbe-calc,wesleyvankomen/cbe-calc