Sphinx-needs

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* Improvement: The sections, to which a need belongs, are now stored, filterable and exported in ``needs.json``. See updated :ref:`option_filter`. (:pr:`53` )
* Improvement: Project specific options for needs are supported now. See :ref:`needs_extra_options`. (:pr:`48` )
* Bugfix: Logging fixed (:issue:`50` )
* Bugfix: Tests for custom styles are now working when executed with all other tests (:pr:`47`)

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* Bugfix: Sphinx warnings fixed, if need-collapse was used. (:issue:`46`)
* Bugfix: dark.css, blank.css and common.css used wrong need-container selector. Fixed.

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* Deprecated: ``needfilter`` is replaced by :ref:`needlist`, :ref:`needtable` or :ref:`needflow`. Which support additional options for related layout.
* Improvement: Added :ref:`needtable` directive.
* Improvement: Added `DataTables <https://datatables.net/>`_ support for :ref:`needtable` (including table search, excel/pdf export and dynamic column selection).
* Improvement: Added :ref:`needs_id_regex`, which takes a regular expression and which is used to validate given IDs of needs.
* Improvement: Added meta information shields on documentation page
* Improvement: Added more examples to documentation
* Bugfix: Care about unneeded separator characters in tags (:issue:`36`)
* Bugfix: Avoiding multiple registration of resource files (js, css), if sphinx gets called several times (e.g. during tests)
* Bugfix: Needs with no status shows up on filters (:issue:`45`)
* Bugfix: Supporting Sphinx 1.7 (:issue:`41`)

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* Bugfix: Supporting plantuml >= 0.9 (:issue:`38`)
* Bugfix: need_outgoing does not crash, if given need-id does not exist (:issue:`32`)

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* Improvement: Added configuration option :ref:`needs_role_need_template`.
* Bugfix: Referencing not existing needs will result in build warnings instead of a build crash.
* Refactoring: needs development files are stored internally under *sphinxcontrib/needs*, which is in sync with
most other sphinxcontrib-packages.

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* Bugfix: dark.css was missing in MANIFEST.in.
* Improvement: Better output, if configured needs_css file can not be found during build.