Garnett

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Fixed
+++++
- Hot fix: Negative euler angles were not read correctly in skewed boxes using the ``DCDFileReader``.

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Added
+++++
- Add the ``whence`` argument to the file format's seek method.

Fixed
+++++
- Fix bug in ``DCDfilereader`` leading to incorrect box dimensions to be read for skewed boxes. Cubic or squared boxes are not affected.

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Fixed
+++++
- Fix quaternion to euler angle conversion example in the DCD file reader documentation.

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Changed
+++++++
- ``GSDHOOMDFileReader`` uses the native GSD library if installed.
- Reduced warning verbosity.

Fixed
+++++
- Fix bug that caused the ``GSDHOOMDFileReader`` to ignore dimensions specified in the GSD file.

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Added
+++++
- Support velocities in HOOMD-blue XML files.
- Support ``SphereUnionShape`` in ``PosFileReader``.

Changed
+++++++
- Support Pos-Files using the keyword 'box' instead of 'boxMatrix'

Fixed
+++++
- Fix bug in ``PosFileReader`` which occured with non-standard pos-file in python 3.5
- Fix bug, which occured when constructing frames from raw frames using box instances instead of a box matrix.

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Fixed
+++++
- Fix bug related to 2-dimensional systems and a box z-dimensions not equal to 1.