• Mark py-djblets deprecated and set expired date

Explanation:

• py-django16 is expired since April 2015 we don't need to keep it anymore.
• The django team have introduced in version 1.7 a new crontrib module called "the staticfile app" [1]. This is required to be enabled manually after the installation and manual changes are needed in setting.py.
• py-djblets requires the staticfile module to be able get installed and to work [2]. Our framework doesn't support it, and there is no plan in a near future to support it.
  
  [1] https://docs.djangoproject.com/en/1.7/ref/contrib/staticfiles/ https://django-doc-test-kor.readthedocs.io/en/latest/howto/static-files/index.html [2] https://github.com/djblets/djblets/blob/release-0.9.6/contrib/internal/build-media.py

PR: 213269

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