Ruby's different logical and/or operators

If you've ever been confused (I know I have) about the difference between Ruby's logical operators (`and` vs `&&` or `or` vs `||`), [this RubyTapas episode by Avdi](http://devblog.avdi.org/2014/08/26/how-to-use-rubys-english-andor-operators-without-going-nuts/) really does a great job of explaining the differences, and use cases for the English operators.
