planarity-0.6

• Add pyx file to distribution
• Update pointer ref to fix clang error

planarity-0.5

• Use latest Boyer code
• Rework ascii() function
• Include cython 3 built planarity.c
• Clean up files and tests

planarity-0.4.1

• Update MANIFEST.in to fix missing files in setuptools packaging
• Require cython

planarity-0.4

• Drop parallel edges in input data with warning
• Update to v 3.0.0.5 of Boyer's C code
• NetworkX 2.0 compability
• Fixes to compile correctly on OSX