* Got npx command line working.
* Generating project folder.
* Added macOS template files.
* Lint fixes
* Remove temp workarounds.
* Make react-native.config.js mac and windows compatible.
* Restore parity of macOS components with iOS because the `react-native init` sample app depends on them: e.g. StatusBar.
* Updated NewAppScreen language for macOS.
* Added `--prerelease` switch to allow installing pre-rerelease versions without prompting as this will be needed in CI.
Made tweaks to templates and fixed template schemes to rename to project name.
Tom Underhill