Adding some docs before refactor.
Adding some docs before refactor.

kyork-cl/zetta,zettajs/zetta,Vam85/zetta,eclub-sense/zetta,eclub-sense/zetta2.0-runtime,DhruvKumar/zetta,zettajs/zetta,DhruvKumar/zetta,eclub-sense/zetta2.0-runtime,eclub-sense/zetta,Vam85/zetta,kyork-cl/zetta