fixing ploting - reading geometry which are as string type Fix #30

The geometry can have few forms: Multipolygon object or Polygon object or string (as Multipolygon or Polygon) if it is Polygon then we just add to list of all polygons we want to plot. If it is Multipolygon we need to break into list of Polygons If it is string we need to first convert to either Polygon or Mulipolygon and do step 1 or step 2

And the main issue is that with new shapely version the converting from string to shapely geometry object has changed.