pypoppler-0.12.1-bp152.3.19

- Add pypoppler-0.12.1-poppler-0.39.0.patch: Fix build with poppler
  0.39.0. Only apply it for builds where we have this version of
  poppler (lp#1528489).
- Make the same change for pypoppler-0.12.1-poppler-0.18.0.patch.

- Add pypoppler-0.12.1-poppler-0.18.0.patch: fix build with poppler
  0.18. Only apply it on 12.1 and later since that's where we have
  this version of poppler.

- Update pypoppler-0.12.1-poppler-0.16.0.patch to also change the
  name of the python method. It seems saner in the long term.

- Add pypoppler-0.12.1-poppler-0.16.0.patch to support new poppler.

- Name the built package python-poppler, to follow the python
  package naming policy.
- Fix license to be GPLv2+ instead of GPLv2.
- Use pkgconfig()-style BuildRequires.

- Spec file cleanup

- Initial package following openSUSE Packaging Guidelines