Clarify Calamari instructions

[amandabee]

The Calamari setup instructions end with:

"calamari-predict should now be available on the commandline"

Am I correct that once that is running you would actually invoke Calamari with lib/ocr.rb calamari {filename} ? If so, we should say that explicitly.

[knowtheory]

Yep, that's correct, i noted that as the way that you'll know that the software was installed correctly.

Happy to either elide that bit, or provide instructions on the command in question. Do you have a preference for which way to go?

[amandabee]

If lib/ocr.rb calamari {filename} is the right way to run Calamari I can fix it.

[knowtheory]

Yep, that's correct.

[amandabee]

Based on the model farther up in the document I used ruby ./lib/ocr.rb calamari {filename} and not lib/ocr.rb ... as proposed here.