Adding minimal README. (#26)

Author: aentinger

README.md

@@ -1,7 +1,41 @@
-# `Arduino_Threads` library for Arduino
+`Arduino_Threads`
+=================
 
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 This library makes it easy to use the multi-threading capability of [Arduino](https://www.arduino.cc/) boards that use an [Mbed OS](https://os.mbed.com/docs/mbed-os/latest/introduction/index.html)-based core library.
+
+## :zap: Features
+### :thread: Multi-threaded sketch execution
+Instead of one big state-machine-of-doom you can split your application into multiple independent threads, each with it's own `setup()` and `loop()` function. Instead of implementing your application in a single `.ino` file, each independent thread is implemented in a dedicated `.inot` representing a clear separation of concerns on a file level.
+
+### :calling: Easy communication between multiple threads
+Easy inter-thread-communication is facilitated via a `Shared` abstraction providing thread-safe sink/source semantics allowing to safely exchange data of any type between threads.
+
+## :mag_right: Resources
+
+* [How to install a library](https://www.arduino.cc/en/guide/libraries)
+* [Help Center](https://support.arduino.cc/)
+* [Forum](https://forum.arduino.cc)
+
+## :bug: Bugs & Issues
+
+If you want to report an issue with this library, you can submit it to the [issue tracker](issues) of this repository. Remember to include as much detail as you can about your hardware set-up, code and steps for reproducing the issue. Make sure you're using an original Arduino board.
+
+## :technologist: Development
+
+There are many ways to contribute:
+
+* Improve documentation and examples
+* Fix a bug
+* Test open Pull Requests
+* Implement a new feature
+* Discuss potential ways to improve this library
+
+You can submit your patches directly to this repository as Pull Requests. Please provide a detailed description of the problem you're trying to solve and make sure you test on real hardware.
+
+## :yellow_heart: Donations
+
+This open-source code is maintained by Arduino with the help of the community. We invest a considerable amount of time in testing code, optimizing it and introducing new features. Please consider [donating](https://www.arduino.cc/en/donate/) or [sponsoring](https://github.com/sponsors/arduino) to support our work, as well as [buying original Arduino boards](https://store.arduino.cc/) which is the best way to make sure our effort can continue in the long term.