added an additional Ref template

I've added a new version of the RealmTemplate-Referee file, this time with additional hex layers for faster hex-colouring and several layers containing fully coloured icons you can select and move around, to help speed up your process. 

The file size has been substantially increased, so the original RealmTemplate-Referee file will continue to be available.

I've also updated the guidance on the main page to reflect the changes. 

I've found that auto-select + fill colouring the hexes on a layer below where you're drawing, then using auto-select + invert then erase to get rid of the redundant hex lines makes for a much faster realm creation process... at least in terms of getting you to the point you can do all the myths and holdings, all that fun stuff.