Added a small readme, so people understand what this is

README.md

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+# WHAT IS THIS?!?
+
+Any time I want to check how to do something, to figure out a solution in
+isolation, I open a project in this repository.
+
+Does it contain anything useful? That's a resounding "Maayybeee..."
+
+Thing is, it is useful **for me**. I can figure out how to fix something
+without fighting a whole project build system, I can tinker the solution in
+isolation, I don't need to worry too much about breaking changes or how to fix
+tests...