Changed

• Added the abil­ity to show ver­tices and end­points of the line layer (to di­ag­nose topol­ogy prob­lems)
• Added topol­ogy poly­gon layer that uses the same dis­play in­ter­faces as the line and poly­gon lay­ers. This takes ad­vances made for the on­board Spa­tialite back­end and gen­er­al­izes them to work with the Post­GIS back­end as well. Us­ing this func­tion­al­ity re­quires shift­ing to the Ver­sion 2 se­ries of the mapboard-server pro­ject.