Update libs.
New database dump

blob -> longblob, clear auto_incriments, subject columns length became
160, address became uniq
Add another pool initialization.

Going to test them latter.
Fix: Bud: attachmet hasn't got letter reference.
Fix: NPE in EmailConfigbuilder.
Is arguable.

Have to do more tests.
NPE fixed.
Fix: Bug: Could not add letter with existing config.