Split USER manager into separated USER manager and NONCE manager,
made them deferred.
And provided effective descendants MEMORY_USER_MANAGER and MEMORY_NONCE_MANAGER.

For example, provided (MEMORY_)NONCE_AND_USER_MANAGER classes, if the user prefer to have a single object.
+Cosmetic
Currently outputting absolute URLs, to debut a problem concerning logout. Added testing class (not sure if I did this correctly).
Currently outputting absolute URLs, to debut a problem concerning logout. Added testing class (not sure if I did this correctly).
added http_authorization.e for commit.
Fixed a small conflict (not sure if I did this correctly).