Python: renamed a couple of plugins. - `src/plugins/miscellaneous/Python` to `src/plugins/miscellaneous/PythonShell`; and - `src/plugins/thirdParty/PythonLibrary` to `src/plugins/thirdParty/Python`.
Revert "Some minor cleaning up." This reverts commit 4f53bd09eca4bc726013990d16086bb72949b97f. Oops, we indeed need to do this before copying the file over!