Issue/#216 new mcity implementation

[agalbachicar]

With the gained experience gained in https://github.com/ekumenlabs/terminus/pull/218 we moved to a new approach. I have created a city from a picture of MCity in a CAD program and that was translated to a handwritten Monolane. It respects the vertical scale to it approximates to the length.

Just for future reference:

• Roads starting with 'a' are horizontal.
• Roads starting with 'b' are vertical.
• Roads starting with 'c' are diagonals.
• Roads starting with 'd' are roundabouts or long pieces of an arc.
• Connections are named like: 'starting_point-ending_point'.

Some pictures of the road are shown below:

closes #216

[basicNew]

Thanks a lot for all the work on this @agalbachicar ! Couple of minor fixes (btw, for the overlapping cases, it should be easier to just make the segment shorter instead of making the arc fit):

And a couple of extensions so we don't leave dead-end streets:

Once we have that I think it should be good for a first pass with TRI.

[agalbachicar]

All comments were addressed. Here are some pictures of the new connections:

@basicNew ready for a new review.

[basicNew]

Ok, I think it is time to merge. Go and open a champagne bottle @agalbachicar :fireworks: :boom: :champagne:

[agalbachicar]

This is a great day :)