todo

• From file:
  Select file from hard disk for import
• From a folder with locally stored web styles:
  select the folder containing the level folders and then adjust the url in MapInfo if necessary, e.g. if the tiles are jpgs instead of pngs
• Online Web Style Source:
  Enter the url and use the wildcards to specify level, x and y

Placeholder for weaving styles:
{0}=level, {1}=x, {2}=y