Calc as a Library
I really like the calc program here and I think it would be a great idea to offer it as a library on Crates.io -- input math expression and get result back. This way I could possibly utilize the calc functionality within the Ion shell for performing more complex math without the need for the process overhead of using an external command -- and without the need to re-implement / duplicate this code.
What do you think? @LazyOxen