Log Message:
Update to 1.4.30:

1.4.30
==================================================

- fix issue68 an assert with a  multiline list comprehension
  was not reported correctly. Thanks Henrik Heibuerger.

1.4.29
==================================================

- fix issue55: revert a change to the statement finding algorithm
  which is used by pytest for generating tracebacks.
  Thanks Daniel Hahler for initial analysis.

- fix pytest issue254 for when traceback rendering can't
  find valid source code.  Thanks Ionel Cristian Maries.

1.4.28
==================================================

- fix issue64 -- dirpath regression when "abs=True" is passed.
  Thanks Gilles Dartiguelongue.

1.4.27
==================================================

- fix issue59: point to new repo site

- allow a new ensuresyspath="append" mode for py.path.local.pyimport()
  so that a neccessary import path is appended instead of prepended to
  sys.path

- strike undocumented, untested argument to py.path.local.pypkgpath

- speed up py.path.local.dirpath by a factor of 10