scripts: Add atags and stacktrace

Add atags and stacktrace bash scripts

Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>
README.md: Some more docu

Add some documentation on the current scripts in README.md

Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>
README: rename README.md to README

I don't care about markdown up left right or whatever it's called

Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>