Merge branch 'mnt/3.6.0-prep' into 'master'

CHANGELOG.rst

README.rst

fsl/data/bitmap.py

fsl/data/image.py

fsl/data/mghimage.py

fsl/utils/ensure.py

fsl/utils/fslsub.py

fsl/utils/memoize.py

fsl/utils/notifier.py

fsl/utils/path.py

fsl/utils/run.py

fsl/utils/weakfuncref.py

fsl/wrappers/fast.py

fsl/wrappers/fsl_anat.py

fsl/wrappers/wrapperutils.py

requirements.txt

setup.py

tests/__init__.py

tests/test_fsl_utils_path.py

tests/test_idle.py