rustlings/exercises/macros/README.md

For this exercise check out the section [Macros](https://doc.rust-lang.org/book/2018-edition/macros.html) and the chapter
[Macros Appendix](https://doc.rust-lang.org/book/2018-edition/appendix-04-macros.html) of the Rust Book and [The Little Book of Rust Macros](https://danielkeep.github.io/tlborm/book/index.html).
Changed Rust Book versions in links to 2018 Forgot to add changes to last commit. 2018-11-27 03:54:01 -06:00			`For this exercise check out the section [Macros](https://doc.rust-lang.org/book/2018-edition/macros.html) and the chapter`
Created sub READMEs for CLI only version Sub READMEs contain the relevant resources from the main README of the web version. All second edition Rust Book links were updated to the 2018 edition. Fixed to typos in main README.md. 2018-11-26 09:43:42 -06:00			`[Macros Appendix](https://doc.rust-lang.org/book/2018-edition/appendix-04-macros.html) of the Rust Book and [The Little Book of Rust Macros](https://danielkeep.github.io/tlborm/book/index.html).`