Restructure repo with a top-level packages/ directory (#1604)

* Restructure repo with a top-level `packages/` directory
* Fix circle ci testing paths
* Remove node_modules from git
* Fix codegen paths
* Fix test paths

Author: jonmmease

LICENSE.txt

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016-2018 Plotly, Inc
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# https://packaging.python.org/guides/packaging-namespace-packages/
+#         pkgutil-style-namespace-packages
+__path__ = __import__('pkgutil').extend_path(__path__, __name__)

_plotly_geo/__init__.py

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+from setuptools import setup
+import os
+
+
+def readme():
+    parent_dir = os.path.dirname(os.path.realpath(__file__))
+    with open(os.path.join(parent_dir, 'README.md')) as f:
+        return f.read()
+
+
+setup(
+    name="plotly-geo",
+    version="1.0.0a1",
+    author="Chris P",
+    author_email="chris@plot.ly",
+    maintainer="Jon Mease",
+    maintainer_email="jon@plot.ly",
+    url="https://plot.ly/python/",
+    project_urls={"Github": "https://github.com/plotly/plotly.py"},
+    description="",
+    long_description=readme(),
+    long_description_content_type="text/markdown",
+    classifiers=[
+        "Development Status :: 5 - Production/Stable",
+        "Programming Language :: Python :: 2",
+        "Programming Language :: Python :: 2.7",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.3",
+        "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Topic :: Scientific/Engineering :: Visualization",
+    ],
+    license="MIT",
+    packages=[
+        "_plotly_geo",
+    ],
+    package_data={'_plotly_geo': ['package_data/*']},
+)