- For Fedora releases, add a python3 subpackage.
- Disable the LEMON compile due to a bug in lemon packaging which
prevents vigra from successfully finding the library (bz# 1526647).
- Move python shebang fix from a patch file into the spec file to easily
choose between python 2/3 based on the release being built.
- Remove unused patches.
- Remove legacy _python_sitearch as all supported release now have this
defined.
- Add conditions for boost-python to allow compiling on releases <= f27.
- Fix the vigra-config docdir to point to the packaged location.
