Krbcontext

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- Fix .travis.yml to use Python 3.7 (Chenxiong Qi)
- Update docs/source/conf.py to read package info properly (Chenxiong Qi)
- Add Python 3.7 to and remove Python 3.5 from TravisCI (Chenxiong Qi)
- Update scripts (Chenxiong Qi)
- Ignore more directories from git (Chenxiong Qi)
- Remove testenv py34 and py35 (Chenxiong Qi)
- Add testenv py37 (Chenxiong Qi)
- Fix typo in comment (Chenxiong Qi)
- Fix renewing expired FILE ccache (Michael Simacek)
- Remove flake8 from BuildRequires from SPEC (Chenxiong Qi)

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- Fix SPEC (Chenxiong Qi)
- Use __future__.absolute_import (Chenxiong Qi)
- Fix and enhance maintanence scripts (Chenxiong Qi)

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- Remove unused meta info (Chenxiong Qi)
- Fix init_with_keytab and tests (Chenxiong Qi)
- Add script for publishing packages (Chenxiong Qi)
- Refine make release script (Chenxiong Qi)

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- Fix reading package info (Chenxiong Qi)

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- Add script for making release (Chenxiong Qi)
- Add distcheck to Makefile (Chenxiong Qi)
- Refine doc settings (Chenxiong Qi)
- Easy to set project info (Chenxiong Qi)
- Bump version to 4.0 in doc (Chenxiong Qi)

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- Migrate to python-gssapi
- Compatible with Python 3