Tooltip and zoom/pan restrictions implemeted

- L.circleMarker replaced with L.divIcon to support 'title' (tooltip) for non-mobile devices with a keyboard and a mouse
- User can set tooltip column
- If the table is present in a Map Window in MapInfo Professional during export the map in the web page will be fit to the bounds of this Map Window
- minZoom and maxBounds are set during script creation
Merge https://github.com/TWIAV/MapInfo2Leaflet