Properly distinguish between AuthScheme and auth scheme name
Throughout the code the terms 'authScheme' and 'scheme' have been used
synonymously for an AuthScheme instance and a string-based auth scheme
name. To avoid confusion, fields, methods and variable have been adapted
to distinguish both properly. If necessary, Javadoc has been modified to
denote the nature of the input.
Also an auth scheme name is retained as-is, but normalized to lowercase
if comparsion is required.
This closes #193
14 files changed
