Distributable JAR build

- connection manager should now be rock stable
- does try to create new connections as long as there are less than eight active connections, which might result in more than eight outgoing connections, but this shouldn't be a problem
- some minor improvements and bug fixes

repositories/src/test/java/ch/dissem/bitmessage/repository/JdbcMessageRepositoryTest.java

@@ -67,7 +67,7 @@ public class JdbcMessageRepositoryTest {
         addressRepo.save(identity);
 
         inbox = repo.getLabels(Label.Type.INBOX).get(0);
-        drafts = repo.getLabels(Label.Type.DRAFTS).get(0);
+        drafts = repo.getLabels(Label.Type.DRAFT).get(0);
 
         addMessage(contactA, identity, Plaintext.Status.RECEIVED, inbox);
         addMessage(identity, contactA, Plaintext.Status.DRAFT, drafts);