v1.0.1 - Minor fixes and changed project name

I changed the project name to better reflect the game rules (connect 4).

Also I updated the internal project structure to be the recommended one (from Rust 2018).

As always, please rename the executable to be connect4, I just had to change their names here for clarification.

What's Changed

• Made the change to use lib.rs by @margual56 in #2

Full Changelog: v1.0...v1.0.1

v1.0.0 - Fist stable release!

First stable release, should not have major issues