1.18.1:

* CSV Import: Fix quoted-newline detection, so we don't drop rows.
  (Murray Cumming) Bug #637529 (Darmon Xavier),
* libglom:
  - Avoid the PyDateTime_Check() crash in strange situations such as under JNI.
  and provide a clue on stderr.
  See bug #644702
  (Murray Cumming)
  - Added utils::build_sql_select_count_rows().
  (Murray Cumming) Bug #645110 (Ben Konrath)
* ComboEntry: Really have an entry.
  (Murray Cumming) Bug #645041 (Ben Konrath)
* Build:
  - Require the latest libgdamm, because we use its latest API.
  - Avoid a tarball-build dependency on mm-common or the mm-common scripts
  installed by the older version of glibmm.
  - Make glom-1.18 parallel-installable with glom-1.16
  (Murray Cumming)