rio-pmtiles python package [#338] (#542)

Add rio-pmtiles command line tool. [#338]

This is derived from the original mapbox/rio-mbtiles implementation, with changes:

* output PMTiles only instead of MBTiles.
* Python 3.7+ only.
* remove --implementation, --image-dump, --append/--overwrite, --covers features.
* bump dependency versions.
* better progress reporting; add pyroaring. 
* update README and license texts.
* rio-pmtiles v0.0.6 on PyPI

python/rio-pmtiles/setup.py

@@ -0,0 +1,50 @@
+from codecs import open as codecs_open
+from setuptools import setup, find_packages
+
+
+# Parse the version from the rio_pmtiles module.
+with open('rio_pmtiles/__init__.py') as f:
+    for line in f:
+        if line.find("__version__") >= 0:
+            version = line.split("=")[1].strip()
+            version = version.strip('"')
+            version = version.strip("'")
+            break
+
+# Get the long description from the relevant file
+with codecs_open('README.rst', encoding='utf-8') as f:
+    long_description = f.read()
+
+
+setup(
+    name="rio-pmtiles",
+    version=version,
+    description=u"A Rasterio plugin command that exports PMTiles",
+    long_description=long_description,
+    classifiers=[],
+    keywords="",
+    author=u"Brandon Liu",
+    author_email="brandon@protomaps.com",
+    url="https://github.com/protomaps/PMTiles",
+    license="MIT",
+    packages=find_packages(exclude=["ez_setup", "examples", "tests"]),
+    include_package_data=True,
+    zip_safe=False,
+    python_requires=">=3.7.0",
+    install_requires=[
+        "click",
+        "cligj>=0.5",
+        "mercantile",
+        "pmtiles~=3.0",
+        "pyroaring~=1.0",
+        "rasterio~=1.0",
+        "shapely~=2.0.0",
+        "supermercado",
+        "tqdm~=4.0",
+    ],
+    extras_require={"test": ["coveralls", "pytest", "pytest-cov"]},
+    entry_points="""
+      [rasterio.rio_plugins]
+      pmtiles=rio_pmtiles.scripts.cli:pmtiles
+      """
+      )