README uses the 'legacy v1 style' of cabal usage about tart

[jtdaugherty]

As far as the build step itself is concerned, though, new-build is the right way to go.

[jtdaugherty]

Yeah, even cabal itself is not consistent across versions about whether this is considered legacy usage. You can just run cabal new-update to get your package index downloaded. I'm actually going to update the README to just not mention the update step, since that's assumed. Thanks for reporting this!

[LoganDark]

I'm actually going to update the README to just not mention the update step, since that's assumed.

Actually I didn't even look at that part of the readme, and only looked at what cabal new-build told me to do. In that case you should probably instruct people how to do it in the correct, non-legacy way. :P

[jtdaugherty]

The trouble is, what constitutes "correct" or "non-legacy" is difficult to pin down because there is no telling what version of the cabal tool any given user will be running. :(