minor update to README, add Patreon section to it

FossilOrigin-Name: 53654aa00f5cb3054db4a07f025a6cbd734c60536047aa5eb48e474cb9145e48

README

@@ -76,25 +76,31 @@ directory.
 
 ## Commercial Versions
 
-I provide proprietary versions of RETRO for iOS and macOS.
-These use a custom, dual pane editor-based environment and
-some platform specific words and extensions. They do use the
+I provide versions of RETRO for iOS and macOS via the Apple app
+stores. These use a custom, dual pane editor-based environment
+and some platform specific words and extensions. They do use the
 same image and virtual machine as `retro`, `retro-repl`, etc.
 
 iOS:   https://itunes.apple.com/us/app/retro-forth-12/id1170943580?ls=1&mt=8
 
 macOS: https://itunes.apple.com/us/app/retro-forth/id1317494014?ls=1&mt=12
 
-The macOS application is also availble for free, though the
-source is not published.
-
-Proceeds from these are used to pay for various project related
-expenses (servers, domains, hardware upgrades, and an
-occasional cup of tea).
-
 ## Alternative Implementations
 
 This source tree includes additional implementations in C#,
 JavaScript, Pascal, and Python. These are not officially
 supported, but are provided for your use if the C
 implementations will not suffice.
+
+## Patreon
+
+I have a Patreon at https://www.patreon.com/_crc for those that
+want to financially support development. All funds raised via
+Pateron are put into development related expenses (server expenses,
+app store fees, hardware).
+
+Thanks go out to my current and past patrons:
+
+- Kiyoshi YONEDA
+- Rick
+- Krinkleneck