Add `install_requires` to `setup.py`

[e13h]

Issue summary

In the README's setup section, it says:

or, in a single line:

pip install git+https://github.com/mapillary/seamseg.git

But, since setuptools.setup() does not include the install_requires argument, the projects dependencies do not get installed.

seamseg/setup.py

Lines 34 to 80 in 3d10aea

	setuptools.setup(
	# Meta-data
	name="seamseg",
	author="Lorenzo Porzi",
	author_email="lorenzo@mapillary.com",
	description="Seamless Scene Segmentation for Pytorch",
	long_description=long_description,
	long_description_content_type="text/markdown",
	url="https://github.com/mapillary/seamseg",
	classifiers=[
	"Programming Language :: Python :: 3",
	"Programming Language :: Python :: 3.4",
	"Programming Language :: Python :: 3.5",
	"Programming Language :: Python :: 3.6",
	"Programming Language :: Python :: 3.7",
	],
	# Versioning
	use_scm_version={"root": ".", "relative_to": __file__, "write_to": "seamseg/_version.py"},
	# Requirements
	setup_requires=["setuptools_scm"],
	python_requires=">=3, <4",
	# Package description
	packages=[
	"seamseg",
	"seamseg.algos",
	"seamseg.config",
	"seamseg.data",
	"seamseg.models",
	"seamseg.modules",
	"seamseg.modules.heads",
	"seamseg.utils",
	"seamseg.utils.bbx",
	"seamseg.utils.nms",
	"seamseg.utils.parallel",
	"seamseg.utils.roi_sampling",
	],
	ext_modules=[
	make_extension("nms", "seamseg.utils"),
	make_extension("bbx", "seamseg.utils"),
	make_extension("roi_sampling", "seamseg.utils")
	],
	cmdclass={"build_ext": BuildExtension},
	include_package_data=True,
	)

The pip install one-liner ends in errors for me unless I install torch myself. And even when I do that, when I try to run the seamseg scripts, I hit errors because dependencies like umsgpack and inplace_abn are not installed.

Possible solution

Could we add something like this?

...
requirements = []
with open("requirements.txt") as f:
    requirements = f.read().splitlines()

setuptools.setup(
    ...
    # Requirements
    setup_requires=["setuptools_scm"],
    python_requires=">=3, <4",
    install_requires=requirements,
    ...
)