Replace references to Hookshot with Rectangle Pro

Author: Aaron-Rumpler

CONTRIBUTING.md

@@ -19,4 +19,4 @@ By contributing to Rectangle you agree that your contributions will be licensed
 
 ## Incentives
 
-Logic from Rectangle is used in the Multitouch app. The Hookshot app is entirely built on top of Rectangle. If you contribute significant code or localizations that get merged into Rectangle, you get a free license of Multitouch or Hookshot. Contributors to Sparkle, MASShortcut, or Spectacle can also receive free Multitouch or Hookshot licenses. Either send me a message on [Gitter](https://gitter.im) or email me from the email address specified on your GitHub profile after you're pull request has been merged.
+Logic from Rectangle is used in the [Multitouch](https://multitouch.app) app. The [Rectangle Pro](https://rectangleapp.com/pro) app is entirely built on top of Rectangle. If you contribute significant code or localizations that get merged into Rectangle, you get a free license of Multitouch or Rectangle Pro. Contributors to Sparkle, MASShortcut, or Spectacle can also receive free Multitouch or Rectangle Pro licenses (just send me a direct message on [Gitter](https://gitter.im)).

README.md

@@ -114,7 +114,7 @@ defaults delete com.knollsoft.Rectangle
 
 ## Contributing
 
-Logic from Rectangle is used in the [Multitouch](https://multitouch.app) app. The [Hookshot](https://hookshot.app) app is entirely built on top of Rectangle. If you contribute significant code or localizations that get merged into Rectangle, you get a free license of Multitouch or Hookshot. Contributors to Sparkle, MASShortcut, or Spectacle can also receive free Multitouch or Hookshot licenses (just send me a direct message on [Gitter](https://gitter.im)).
+Logic from Rectangle is used in the [Multitouch](https://multitouch.app) app. The [Rectangle Pro](https://rectangleapp.com/pro) app is entirely built on top of Rectangle. If you contribute significant code or localizations that get merged into Rectangle, you get a free license of Multitouch or Rectangle Pro. Contributors to Sparkle, MASShortcut, or Spectacle can also receive free Multitouch or Rectangle Pro licenses (just send me a direct message on [Gitter](https://gitter.im)).
 
 ### Localization