Django-crontab

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* bugfix: allow project path to contain "run" 30 (thx vinsia)

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* dropped Django 1.7 and below, you'll need at least 1.8
* added support for Django 1.9 + Python 3.5

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* refactoring for being better testing (big thx arski)
* feature: TESTS! > 90% coverage
* feature: compatiblity with Django 1.3 - 1.7 and Python 3.3 + 3.4
* feature: ability to run the scheduled command with a different settings module 10 (thx chamaken)
* bugfix: fixed unsupported compare between str and int in python 3.4 19 (thx justdoit0823)

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* bugfix: added 2 formats for jobs to keep backward compatiblity with 0.4.x
* feature: subcommand "show" that lists currently active jobs from crontab

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* feature: positional and keyword arguments for job functions as third and fourth job tuple element. this enables django
management commands to be called, see documentation
NOTE: this is a breaking change when you used job suffixes, they will move from third
to fifth job tuple element
* feature: prevent starting a job if an old instance of the same job is still running (thx arski)
* feature: logging job's possible exceptions (thx arski)

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* bugfix: only replace "pyc" with "py" in file's extension (thx cinghiale)