o Minor bugfixes
    - Fix a memory leak in the error case of circuit_build_times_parse_state().
      Bugfix on 0.2.2.14-alpha; fixes bug 1831 partially.
    - Fix a memory leak in dirvote_add_signatures_to_pending_consensus(). 
      Bugfix on 0.2.2.6-alpha; fixes bug 1831 partially.
    - Fix a memory leak in dirvote_compute_consensuses().
      Bugfix on 0.2.0.3-alpha; fixes bug 1831 partially.