Update CONTRIBUTING.md (#186)

CONTRIBUTING.md

@@ -1,11 +1,52 @@
-# Note
+# Contributing
 
-During the pre-alpha stage, the APIs are changing rapidly.
-I don't want to disappoint people with huge merge conflicts, so new features are not accepted yet.
+## Accepted changes
 
-I welcome fixes and possibly also board implementations:
-Please open an [Issue](https://github.com/ByteWelder/Tactility/issues/new) on GitHub to discuss first new boards!
+Before releasing version 1.0.0, the APIs are changing rapidly.
+I want to minimize the amount of changes that I have to maintain, because it limits the amount of breaking changes that I have to deal with when the APIs change.
 
-# Code Style
+### New features
+
+These are currently not accepted.
+
+### Visual / interaction design changes
+
+These are currently not accepted. I'm aware that there is a lot of room for improvement, but I want to mainly focusing on strong technical foundations before
+I start building further on top of that.
+Feel free to open an [issue](https://github.com/ByteWelder/Tactility/issues/new) to discuss ideas you have, if you feel like they will have a considerable impact.
+
+### Fixing things
+
+The general take here is that minor changes are not accepted at this stage. I don't want to spend my time reviewing and discussing these during the current stage of the project.
+
+Only fixes for serious issues are accepted, like:
+- Bugs
+- Crashes
+- Security issues
+
+Some examples of non-serious issues include:
+- Documentation changes
+- Renaming code
+- Fixes for compiler warnings that have low impact on the actual application logic (e.g. only happens on simulator when calling a logging function)
+
+### New board implementations
+
+I only support boards that I also own. If I don't own a board, I can't properly test the reliability of the firmware.
+If you wish to send me a board, please [contact me](https://tactility.one/#/support).
+
+Please open an [issue](https://github.com/ByteWelder/Tactility/issues/new) on GitHub to discuss new boards.
+
+If you implemented a board yourself, I'm willing to refer to your implementation on the main website. Please [contact me](https://tactility.one/#/support).
+
+### Anything that doesn't fall in the above categories?
+
+Please [contact me](https://tactility.one/#/support)a me first!
+
+## Pull Requests
+
+Pull requests should only contain a single set of changes that are related to eachother.
+That way, an approved set of changes will not be blocked by an unapproved set of changes.
+
+## Code Style
 
 See [this document](CODING_STYLE.md) and [.clang-format](.clang-format).