Change two instances of "{:" to ":{" in the README.
Add a required type signature to a $setup variable in the README.
Fix a typo in the README xpto example.
Update the "x + y + works" README example due to recent advances in addition.
Add a new README section titled "Multi-line output".
Add an example of <BLANKLINE> usage to the "Multi-line output" README section.
Fix another instance of the typo, "xtpo".
Merge pull request #87 from mjorlitzky/master

Bunch of README fixes, and addition of the "Multi-line output" section