Add paypal link thing

README.md

@@ -16,6 +16,10 @@ Please [report missing features/bugs on GitHub](https://github.com/VSCodeVim/Vim
 
 Ask us questions, talk about contributing, or just say hi on [Slack](https://vscodevim-slackin.azurewebsites.net)!
 
+## Donations
+
+I'd like to work more on this project, but it's hard to justify over other projects when it's essentially pro bono. [Convince me otherwise by making a donation!](https://www.paypal.com/us/cgi-bin/webscr?cmd=_flow&SESSION=2Q_HylRdsudPD-_hjEiC3AwuEk_ON4cqLkyCeIY34BSWtuqYf4fsvZY6UQe&dispatch=5885d80a13c0db1f8e263663d3faee8d333dc9aadeed3fe0b5b299d55fd35542)
+
 ## Supported Options
 
 The following is a subset of the supported configurations; the full list is described in the `Contributions` tab for this extension, or in our [package.json](https://github.com/VSCodeVim/Vim/blob/master/package.json#L175):