Improve naming of project folders and files

[rjust]

compile-errors: provides source and/or test patches that are applied in a post-checkout routine. These patches may fix build files, compilation errors, or test failures -- if the required changes are trivial.

dependent_tests: lists flaky tests, only some of which are order-dependent tests.

patches: src patches are minimized and reintroduce the bugs; test patches are unmodified diff outputs and should be deleted as they can easily be regenerated by running (git) diff.