Merge branch 'enh/wrappers' into msc

CHANGELOG.rst

doc/contributing.rst

fsl/data/fixlabels.py

fsl/scripts/extract_noise.py

fsl/utils/path.py

fsl/utils/tempdir.py

fsl/wrappers/__init__.py

fsl/wrappers/bet.py

fsl/wrappers/fast.py

fsl/wrappers/flirt.py

fsl/wrappers/wrapperutils.py

requirements-dev.txt

setup.py

tests/__init__.py

tests/test_extract_noise.py

tests/test_fixlabels.py

tests/test_freesurfer.py

tests/test_fsl_utils_path.py

tests/test_image.py

tests/test_tempdir.py