Update README.md

Add a link to donate page.

README.md

@@ -52,3 +52,8 @@ The apps that install best with Scoop are commonly called "portable" apps: i.e.
 Since installers are common, Scoop supports them too (and their uninstallers).
 
 Scoop is also great at handling single-file programs and Powershell scripts. These don't even need to be compressed. See the [runat](https://github.com/lukesampson/scoop/blob/master/bucket/runat.json) package for an example: it's really just a GitHub gist.
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+### Support this project
+
+If you would like to financially support the ongoing development and maintainence of Scoop, please see [scoop.sh/donate](https://scoop.sh/donate).