Update the documentation files

Signed-off-by: Davide Madrisan <davide.madrisan@gmail.com>
tests: fix an obsolete and now unsupported syntax for 'find -perm'

tests/test01_pkgquality
tests/test02_pkgsecurity

Fix an obsolete and now unsupported syntax of the external tool 'find'
(-perm +<mode>) that made some quality and security tests fail.
The supported one is now: -perm /<mode>

Signed-off-by: Davide Madrisan <davide.madrisan@gmail.com>
Initial commit
Update README.md