Compas-cem

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**Added**

* Added node coloring for free and support nodes in `FormPlotter()`.
* Added `TopologyPlotter.draw_segments()`
* Added color scheme for `auxiliary_trail_edges` when using `TopologyPlotter.draw_edges()`

**Changed**

**Fixed**

* Set `tight=False` when `axes.autoscale` is called by `Plotter.save()`. Overcropped saved image

**Deprecated**

**Removed**

* Deleted custom edge and node keys in `form_plotter_proxy` and in `topology_plotter_proxy`
* Removed frame polygon from `form_plotter_proxy` and in `topology_plotter_proxy`

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**Added**

**Changed**

**Fixed**

* Fixed bug in `static_equilibrium` and `static_equilibrium_numpy` when calculating support forces
* Fixed bug in `TopologyArtist` gh component: took in list of nodes instead of list of edges
* Temporary patch in length calculation in `DeviationEdgeLengthConstraint` that raised error with `autograd`.

**Deprecated**

**Removed**

----------

**Added**

* Added automatical creation of auxiliary trails.
* Added `auxiliary_trails=False` to the signature of `TopologyDiagram.build_trails()`.
* Added `TopologyDiagram.auxiliary_trails()` iterator.
* Added `TopologyDiagram.auxiliary_trail_edges()` iterator.
* Added `TopologyDiagram.is_auxiliary_trail_edge()` edge filter.
* Added `TopologyDiagram.number_of_auxiliary_trails()`.
* Added property `TopologyDiagram.auxiliary_trail_length` with setter.
* Added property `TopologyDiagram.auxiliary_trail_vector` with setter.
* Created first full version of GH plugin under `compas_cem.ghpython.components`

**Changed**

* Changed `TopologyDiagram.trails()` to return an iterable of trails instead of a dictionary.
* Changed `TopologyDiagram.build_trails()` to not return anything.
* The type of a trail is `tuple`, no longer `list` to reflect they are immutable.
* Splitted `Constraint()` into children classes `VectorConstraint()` and `FloatConstraint()`.
* Renamed `error` to `penalty` in `compas_cem.optimization`.
* Refactores examples folder.

**Fixed**

* Changed check for `None` in `NodeMixins.node_xyz()`.

**Deprecated**

**Removed**

* Removed `None` from default arguments in optimization constraints and parameters.

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**Added**

* Implemented `TopologyArtist` and `FormArtist`
* Added `compas_cem.rhino_install` to streamline the symlink with Rhino
* Added `src/compas_cem/ghpython/components/ghuser/` to `.gitignore`

**Changed**

* Refactored `compas_cem.rhino_install` into `compas_cem.ghpython.install`
* Refactored `compas_cem.rhino_install` into `compas_cem.ghpython.uninstall`

**Fixed**

**Deprecated**

**Removed**

* Removed `compas_cem.rhino_install`

----------

**Added**

**Changed**

**Fixed**

**Deprecated**

**Removed**

* Deleted tag regex from `.bumpversion.cfg`

------
**Added**

* Added automatic tag versioning to `CHANGELOG.md`

**Changed**

* Renamed `CHANGELOG.md` to `CHANGELOG.rst`

**Fixed**

**Deprecated**

**Removed**