[AIRFLOW-3697] Vendorize nvd3 and slugify

nvd3 has a dependency on python-slugify which pulls in a
GPL dependency by default, which we don't want.

This commit brings in nvd3 0.15.0 and slugify 2.0.1 WITH NO CHANGES -
those will come in the next commit

.flake8

@@ -1,3 +1,4 @@
 [flake8]
 max-line-length = 110
 ignore = E731,W504
+exclude = .svn,CVS,.bzr,.hg,.git,__pycache__,.tox,.eggs,*.egg,*/_vendor/*

.rat-excludes

@@ -59,3 +59,6 @@ coverage.xml
 rat-results.txt
 apache-airflow-.*\+source.tar.gz.*
 apache-airflow-.*\+bin.tar.gz.*
+
+# vendored modules
+_vendor/*

.travis.yml

@@ -24,7 +24,6 @@ python:
 env:
   global:
     - DOCKER_COMPOSE_VERSION=1.20.0
-    - SLUGIFY_USES_TEXT_UNIDECODE=yes
     - TRAVIS_CACHE=$HOME/.travis_cache/
   matrix:
     - TOX_ENV=py27-backend_mysql-env_docker

LICENSE

@@ -240,6 +240,8 @@ The text of each license is also included at licenses/LICENSE-[project].txt.
     (MIT License) normalize.css v3.0.2 (http://necolas.github.io/normalize.css/)
     (MIT License) ElasticMock v1.3.2 (https://github.com/vrcmarcos/elasticmock)
     (MIT License) MomentJS v2.22.2 (http://momentjs.com/)
+    (MIT License) python-slugify v2.0.1 (https://github.com/un33k/python-slugify)
+    (MIT License) python-nvd3 v0.15.0 (https://github.com/areski/python-nvd3)
 
 ========================================================================
 BSD 2-Clause licenses

MANIFEST.in

@@ -24,9 +24,10 @@ graft licenses/
 graft airflow/www
 graft airflow/www/static
 graft airflow/www/templates
-graft airflow/www/translations
+graft airflow/_vendor/
 include airflow/alembic.ini
 graft scripts/systemd
 graft scripts/upstart
 graft airflow/config_templates
 recursive-exclude airflow/www/node_modules *
+global-exclude __pycache__  *.pyc

NOTICE

@@ -17,3 +17,15 @@ This product contains a modified portion of 'Hue' developed by Cloudera, Inc.
 (https://github.com/cloudera/hue/).
 
 * Copyright 2009-2017 Cloudera Inc.
+
+python-slugify:
+---------------
+
+* Copyright (c) Val Neekman @ Neekware Inc. http://neekware.com
+
+python-nvd3:
+------------
+
+* Copyright (c) 2013 Arezqui Belaid <[email protected]> and other contributors
+
+

airflow/_vendor/README

@@ -0,0 +1,13 @@
+Original files in this directory were created with the following commands::
+
+    mkdir -p slugify/
+    curl -fsSL -O https://files.pythonhosted.org/packages/1f/9c/8b07d625e9c9df567986d887f0375075abb1923e49d074a7803cd1527dae/python-slugify-2.0.1.tar.gz
+    tar -xzf python-slugify-*.tar.gz --strip-components=2 -C slugify/ '*/slugify/*'
+    tar -xzf python-slugify-*.tar.gz --strip-components=1 -C slugify/ '*/LICENSE'
+    rm *.tar.gz
+
+    mkdir -p nvd3/
+    curl -fsSL -O https://files.pythonhosted.org/packages/0b/aa/97165daa6e319409c5c2582e62736a7353bda3c90d90fdcb0b11e116dd2d/python-nvd3-0.15.0.tar.gz
+    tar -xzf python-nvd3-*.tar.gz --strip-components=2 -C nvd3/ '*/nvd3/*'
+    tar -xzf python-nvd3-*.tar.gz --strip-components=1 -C nvd3/ '*/LICENSE'
+    rm *.tar.gz

airflow/_vendor/__init__.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.

airflow/_vendor/nvd3/LICENSE

@@ -0,0 +1,24 @@
+The MIT License (MIT)
+
+Python-nvd3
+
+Copyright (c) 2013 Arezqui Belaid <[email protected]> and other contributors
+
+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.