v0.5.0

Replace imp by importlib, Python 3 defaults to PEP517 packaging by @hseg.

v0.3.9

• Fix Python2 compatibility issue.

v0.3.8

• Fix Python2 compatibility issue.

v0.3.7

• Fix determining known licenses according to RFC16 by @hseg.

v0.3.6

• Add python-wheel as mkdepend for PEP517 based package.
• Disable PEP517 based PKGBUILD generation for Python 2 packages.

v0.3.5

Fix issue of accessing extracted source folder.