1) adding a version now updates the head-of-branch properly 2) eraseVersion() deals with the doubly linked list properly
1) adding a version now updates the head-of-branch properly
2) eraseVersion() deals with the doubly linked list properly

fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary