Fix geometry-perimeter intersection

[G21-Goose]

Some geometry was removed, even through it was partially in the perimeter such as in issue #46 where not all the river was visible because the last bit partially went out of the perimeter. This seemed to happen when a perimeter was provided and not a point or radius.

If geometries = geometries.intersection(perimeter) is changed to geometries = geometries.intersection(perimeter).buffer(0) it seems to have behaviour that would be expected.

Before change

After change

Also the buffer on the perimeter in get_geometries() and get_streets() was being performed on the longitude and latitude in degrees, not meters. It now projects it, buffers it in meters, then turns it back into degrees for the ox.geometries_from_polygon()/ox.graph_from_polygon().

The get_streets() function would have streets going over the perimeter when only used with a perimeter. This was because the intersection code wasn't running when only a perimeter was used, and the perimeter was still a GeoDataFrame because the line perimeter = unary_union(ox.project_gdf(perimeter).geometry) was missing.

[G21-Goose]

There was also an issue with some roads disappearing like in the case of #53 . This is because highway is sometimes a list e.g.

['residential', 'footway']

Because this does not equal residential or footway it was being excluded when the highways are being assigned a width. It has been changed to check if the highway being widened is in any of the values, so 'residential' is in ['residential','footway']

[G21-Goose]

There were a few conflicts that I need to fix