add readme with screenshots and download link

README.md

@@ -1,4 +1,31 @@
-# dotBeat Internet Time
+# dotBeat Internet Time for macOS
 
-dotBeat is a macOS menu bar app that displays the current [Swatch Internet Time](https://en.wikipedia.org/wiki/Swatch_Internet_Time) in your menu bar. In addition to the menu bar display, dotBeat features a window that gives you a global view into what time corresponds to each __.beat__ in Internet Time.
-
+dotBeat Internet Time is a small app that shows the current [Swatch Internet Time](https://en.wikipedia.org/wiki/Swatch_Internet_Time) in your menu bar. It also includes a 'simulator', giving you a view into how Internet Time corresponds to local times across the globe, perfect for when you're trying to coordinate a meeting time with others.
+
+## Screenshot
+
+![dotBeat Screenshot](/.github/screenshot.png?raw=true)
+
+## Download
+
+- [Download dotBeat v1.0 for macOS 10.12 and later](https://amiantos.s3.amazonaws.com/dotBeat-v1.0.zip)
+- Or, Purchase dotBeat on the App Store (Coming Soon)
+
+## What is Internet Time?
+
+What is "Swatch Internet Time"? Internet Time was dreamed up by Swatch in 1998. It's a  way to tell time, globally, without time zones. Every day is divided up into 1000 ".beats", starting from midnight BMT (GMT+1), running from @0 to @999.
+
+In theory, this makes it easier to coordinate meeting times with people across the world: just tell them the .beat, and they can figure out the rest with something like dotBeat. For example, @42 is 4:00 PM in California, but it's 5:45 AM in Nepal.
+
+## Like dotBeat a lot?
+
+- Purchase dotBeat on the App Store (Coming Soon)
+- [Sponsor amiantos on GitHub](https://github.com/sponsors/amiantos)
+- [Become a patron on Patreon](https://www.patreon.com/amiantos)
+
+## Credits
+
+- dotBeat was built by [Brad Root](https://github.com/amiantos)
+- dotBeat uses the icon [At Symbol by Soni Sokell](https://thenounproject.com/icon/at-symbol-4032703/)
+- “Swatch” is a registered trademark of The Swatch Group Ltd. 
+- dotBeat is in no way affiliated with Swatch® or its products.