Extract property for areas where plant grows

[petteripitkanen]

Analyze the practicalplants data to extract a property for the areas where a plant grows. This data is extracted mainly from the property range, but at least the property habitat also has some overlapping information. Both of these properties contain free-form text.

After a quick look on the data it looks possible to extract an array of enum values where each value describes a geographical area. For now it looks okay if these areas are overlapping, or if one area is contained within another, or if some information is lost.