add Orthogonalize algorithm

[stefanocudini]

Orthogonalize feature cloud be more useful in any cases.. like as JOSM and iD Openstreetmap editors.
In Github doesn't exists nothing simlar to this, one proposal library I am 'starting here:
https://github.com/stefanocudini/orthogonalize-js

based on:
https://github.com/openstreetmap/iD/blob/master/js/id/actions/orthogonalize.js

but it require few times for conversion from iD structure to generic javascript module

[Wilkins]

I'm not sure what you want to achieve.

Is this what you want to do ? :

The original path :

The simplified path :

The simplified and orthogonalized path :

I thought orthogonalize was for polygons to make nice rectangles. Do you think this is useful for paths ?

[stefanocudini]

I think that this can be more useful for stylized maps.. when the style is more importart instead of accuracy..
For example using a map like as entry point of an selection

View this plugin and imagine you have many paths instead of shapes, for select any things:
https://github.com/stefanocudini/leaflet-geojson-selector

In addition this behavior improves the visibility of a map when includes many many paths along

In some cases.. is more useful!

[stefanocudini]

@Wilkins I'm added you into contributors

[Wilkins]

@stefanocudini Wow, thank you very much, I really appreciate it ! I'll try to keep going :-)