Refactor for v0.4 to better match distutils, reintroduce .dist
Fix defmacros->define.
Link against libraries at linking of shared object.
Added pc_sdist. Version 0.4.0
PEP8 fixes, added setup.cfg
Merge pull request #9 from bjodah/v0.4-dev

Refactor for v0.4 to better match distutils, reintroduce .dist