Add Blue Line to README.md

[nekodjin]

Correct the README to reflect that a Blue Line tracker has been added to the app.

[devinmatte]

Thanks for making a PR! I think this whole sentence could use a rewrite as we show new Orange, Red and Green line cars, and we additionally show Blue line cars, but there are no "new" blue line cars to show or track. If you want to take a crack at rewriting this to be more clear on that point that would be great

[nekodjin]

How about something along the lines of:

The tracker shows the current location of Orange, Red, Green, and Blue Line trains on the MBTA network. It shows which Red and Green Line trains are new, and which are old.

It doesn't really make sense to include the OL, since just as the BL has no "new" trains, the OL no longer has any "old" ones...

[mathcolo]

@nekodjin That would work! Could you make that change to your branch?

[nekodjin]

On it by tomorrow :)

[nathan-weinberg]

@nekodjin Hey! We'd still be interested in getting that change in if you can make the suggested update 😄

[nathan-weinberg]

Since this seems to be abandoned I'm going to close this for now - @nekodjin if you're able to come back around and update your branch feel free to reopen it!