Include missing files in sdist

[thatch]

Include missing files in sdist for #29

Tested with

++ mktemp -d
+ D=/tmp/tmp.N3MxLmqLfX
+ trap 'rm -rf /tmp/tmp.N3MxLmqLfX' EXIT
+ python -m venv /tmp/tmp.N3MxLmqLfX
+ python setup.py sdist -d /tmp/tmp.N3MxLmqLfX
running sdist
running egg_info
writing gamry_parser.egg-info/PKG-INFO
writing dependency_links to gamry_parser.egg-info/dependency_links.txt
writing requirements to gamry_parser.egg-info/requires.txt
writing top-level names to gamry_parser.egg-info/top_level.txt
reading manifest file 'gamry_parser.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'gamry_parser.egg-info/SOURCES.txt'
running check
creating gamry_parser-0.4.2
creating gamry_parser-0.4.2/gamry_parser
creating gamry_parser-0.4.2/gamry_parser.egg-info
creating gamry_parser-0.4.2/tests
copying files to gamry_parser-0.4.2...
copying MANIFEST.in -> gamry_parser-0.4.2
copying README.md -> gamry_parser-0.4.2
copying dev-requirements.txt -> gamry_parser-0.4.2
copying requirements.txt -> gamry_parser-0.4.2
copying setup.py -> gamry_parser-0.4.2
copying gamry_parser/__init__.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/chronoa.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/cv.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/eispot.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/gamryparser.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/ocp.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/version.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser/vfp600.py -> gamry_parser-0.4.2/gamry_parser
copying gamry_parser.egg-info/PKG-INFO -> gamry_parser-0.4.2/gamry_parser.egg-info
copying gamry_parser.egg-info/SOURCES.txt -> gamry_parser-0.4.2/gamry_parser.egg-info
copying gamry_parser.egg-info/dependency_links.txt -> gamry_parser-0.4.2/gamry_parser.egg-info
copying gamry_parser.egg-info/requires.txt -> gamry_parser-0.4.2/gamry_parser.egg-info
copying gamry_parser.egg-info/top_level.txt -> gamry_parser-0.4.2/gamry_parser.egg-info
copying tests/__init__.py -> gamry_parser-0.4.2/tests
copying tests/test_chronoamperometry.py -> gamry_parser-0.4.2/tests
copying tests/test_cyclicvoltammetry.py -> gamry_parser-0.4.2/tests
copying tests/test_gamryparser.py -> gamry_parser-0.4.2/tests
copying tests/test_impedance.py -> gamry_parser-0.4.2/tests
copying tests/test_ocp.py -> gamry_parser-0.4.2/tests
copying tests/test_vfp600.py -> gamry_parser-0.4.2/tests
Writing gamry_parser-0.4.2/setup.cfg
Creating tar archive
removing 'gamry_parser-0.4.2' (and everything under it)
+ cd /
+ /tmp/tmp.N3MxLmqLfX/bin/pip install /tmp/tmp.N3MxLmqLfX/gamry_parser-0.4.2.tar.gz
Processing /tmp/tmp.N3MxLmqLfX/gamry_parser-0.4.2.tar.gz
Collecting pandas (from gamry-parser==0.4.2)
  Using cached https://files.pythonhosted.org/packages/f5/10/40688389f5e234bde06aa84e6f3ccf5beea6269f57e2bef67866d3b43268/pandas-1.0.3-cp38-cp38-manylinux1_x86_64.whl
Collecting pytz>=2017.2 (from pandas->gamry-parser==0.4.2)
  Using cached https://files.pythonhosted.org/packages/4f/a4/879454d49688e2fad93e59d7d4efda580b783c745fd2ec2a3adf87b0808d/pytz-2020.1-py2.py3-none-any.whl
Collecting numpy>=1.13.3 (from pandas->gamry-parser==0.4.2)
  Using cached https://files.pythonhosted.org/packages/cf/5d/e8198f11dd73a91f7bde15ca88a2b78913fa2b416ae2dc2a6aeafcf4c63d/numpy-1.18.4-cp38-cp38-manylinux1_x86_64.whl
Collecting python-dateutil>=2.6.1 (from pandas->gamry-parser==0.4.2)
  Using cached https://files.pythonhosted.org/packages/d4/70/d60450c3dd48ef87586924207ae8907090de0b306af2bce5d134d78615cb/python_dateutil-2.8.1-py2.py3-none-any.whl
Collecting six>=1.5 (from python-dateutil>=2.6.1->pandas->gamry-parser==0.4.2)
  Using cached https://files.pythonhosted.org/packages/ee/ff/48bde5c0f013094d729fe4b0316ba2a24774b3ff1c52d924a8a4cb04078a/six-1.15.0-py2.py3-none-any.whl
Installing collected packages: pytz, numpy, six, python-dateutil, pandas, gamry-parser
  Running setup.py install for gamry-parser: started
    Running setup.py install for gamry-parser: finished with status 'done'
Successfully installed gamry-parser-0.4.2 numpy-1.18.4 pandas-1.0.3 python-dateutil-2.8.1 pytz-2020.1 six-1.15.0
WARNING: You are using pip version 19.2.3, however version 20.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
+ echo Success
Success
++ rm -rf /tmp/tmp.N3MxLmqLfX