python-blockdiag: bump 1.2.4 -> 1.3.2

Changes:
  1.3.2 (2013-11-19)
  Fix bugs

  1.3.1 (2013-10-22)
  Fix bugs

  1.3.0 (2013-10-05)
  Support python 3.2 and 3.3 (thanks to @masayuko)
  Drop supports for python 2.4 and 2.5
  Replace dependency: PIL -> Pillow

(The test phase still fails for one test, so continue having it disabled.)