… base_choropleth_classif/unique/classless

* removed 'projection' from base_choropleth_classif/unique/classless
* Allow base_choropleth_classif/unique/classless to plot multi-part polygons properly
* changes streamlined to generic plot_choropleth
* Added dependency on pandas for rapid reindexing (this is done externally on the method _expand_values to it is easy to drop the dependency when neccesary/time available)

…ing module

…his brings much more flexibility and opens the door to plot formats other than shapefiles (e.g. geojson)

…erything else in line with it *Adding example for line colorig and mixing overlaying of points.

… come from map_point_shp or from a simple matplotlib scatter

…pleth_classless

… wanna be able to build a PathCollection out of the XYs, but for now we rely on plt.scatter, which gets the job done but has some problems.

…s but not on the plotting toolkit