The root command will run node checks and if possible master checks.
I've also added some Makefile targets to improve local testing and improve the documentation.
* Replace the default help text
* Readme file, including the test config format documentation
* Typo
* Warn if config files / executables aren't found
* Ignore original name of executable (as per current README)
* Update tests to avoid failing on stat of a non-existant file
* Add a makefile for ease of build