translated README file to Markdown
Use return value from TokenEnhancer.enhance
cascade token saves
fixed unit test to account for cascading tokens
Change copyright from Netcetera to MITRE/MIT-KIT.
fixed information leaks from approved site API
make user info interceptor more compatible with standalone OIDC client software (with no user info service)
hash tests now pass on Java8
made user info interceptor more null safe for client side
Don't delete the entire client when a single email address is removed