Sphinx-needs

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* Improvement: needfilter directives supports complex filter-logic by using parameter :ref:`filter`.

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* Improvement: Added word highlighting of need titles in linked pages of svg diagram boxes.

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* Bugfix for custom needs_types: Parameter in conf.py was not taken into account.

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* Added configuration parameter :ref:`needs_id_required`.
* Backwards compatibility changes:

* Reimplemented **needlist** as alias for ``needfilter``
* Added *need* directive/need as part of the default :ref:`needs_types` configuration.

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**Initial start for the changelog**

* Free definable need types (Requirements, Bugs, Tests, Employees, ...)
* Allowing configuration of needs with a

* directive name
* meaningful title
* prefix for generated IDs
* color

* Added **needfilter** directive
* Added layouts for needfilter:

* list (default)
* table
* diagram (based on plantuml)

* Integrated interaction with the activated plantuml sphinx extension

* Added role **need** to create a reference to a need by giving the id