Getting started documentation

[floesche]

Since you just went through the process, can you write a Getting-started-with-development.md documentation with what you learned. It is very difficult for me to guide people to all the things they need to know when they want to improve FlyFlix, but maybe you have some good ideas what to look at, what to read, and which files are most important to understand.

If it helps, you could write separate files for "What to do when you want to develop a new stimulus", or "What to do if you want implement a new protocol based on existing stimuli"?