Added some clarification to the logo js usage docs
Added some clarification to the logo js usage docs

Wrote down ranges and fleshed out the column_info docs to explain the
value that it expects.

Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer,Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer,ProteinsWebTeam/LogoServer,Janelia-Farm-Xfam/LogoServer