CT: I-91/I-291/CT-218 issue

[rickmastfan67]

I-291:
1 -> 2 - Since we're 'ending' I-291 @ I-91 and not 'continuing' it along the ramps to CT-218 (which is Exit 1), I think we should 'reflect' the exit number for the I-91 ramps here instead.

I-91:
35 -> 35A
NEW -> 35B (for CT-218)

We're missing a genuine graph connection here for CT-218 with I-91.  Sure, it's barely north of the center point for I-291, but they are both completely separate interchanges here with all the possible movements.

Plus, CT-218's file already has a point for I-91 there.  Adding the same point into I-91's file would make complete sense here.