Merge commit '8f784a5d' into release-0.2.0

README.rst

docs/fields.rst

docs/vis.rst

environment.yml

setup.cfg

src/empyre/__init__.py

src/empyre/fields/__init__.py

src/empyre/fields/field.py

src/empyre/utils/__init__.py

src/empyre/utils/misc.py

src/empyre/utils/quaternion.py

src/empyre/vis/plot2d.py