LICENSE and NOTICE improvements

CrateDB is not a product of the Apache Software Foundation (ASF),
however, we have decided that it is prudent to follow the ASF's own
guidelines for applying the Apache License 2.0 to our project.

We are following most of the principals set out in this document:

    https://www.apache.org/dev/apply-license.html

However, some principals do not apply, or we have chosen not to apply
them on a case-by-case basis.

For the purposes of this patch, the three main changes are:

- Removed several out-of-date sections from LICENSE. Specifically, if we
  are not bundling the bits of a third-party dependency in our Git
  repository, we are not documenting that software for the purposes of
  LICENSE or NOTICE.

- We have made a minor exception to the above principal, and have chosen
  to document the nature of the `es/upstream` Git submodule.

- The NOTICE file has been improved with a few small fixes and a better
  description of how we are handling the documentation of licensing
  matters.

LICENSE.txt → LICENSE

@@ -1,20 +1,3 @@
-Crate
-Copyright 2013-2016 Crate.IO GmbH ("Crate")
-
-
-Licensed to Crate.IO GmbH (referred to in this notice as "Crate")
-under one or more contributor license agreements.  See the NOTICE file
-distributed with this work for additional information regarding copyright
-ownership.
-
-Crate licenses this software to you under the Apache License, Version 2.0.
-However, if you have executed another commercial license agreement with
-Crate these terms will supersede the license and you may use the software
-solely pursuant to the terms of the relevant commercial agreement.
-
-
-=========================================================================
-
 
                                  Apache License
                            Version 2.0, January 2004
@@ -217,3 +200,24 @@ solely pursuant to the terms of the relevant commercial agreement.
    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.
+
+
+================================================================================
+
+For the `es/upstream` directory:
+
+NOTE: in the source repository, this directory is configured as a Git submodule.
+
+Elasticsearch
+Copyright 2009-2017 Elasticsearch
+
+Licensed under the Apache License, Version 2.0 (see above for full license
+text).
+
+Elasticsearch bundles a number of third-party components. For a full list of
+the respective licenses, consult the relevant LICENSE.txt files included with
+the source code.
+
+As a general guideline, it is a policy of the Apache Software Foundation that
+all bundled third-party components should be available under a category A
+license (https://www.apache.org/legal/resolved.html#category-a).

NOTICE

@@ -1,130 +1,45 @@
-Crate
-Copyright 2013-2015 Crate.IO GmbH ("Crate")
+CrateDB
+Copyright 2013-2018 Crate.IO GmbH ("Crate")
 
 
-Third party dependencies:
+Licensed to Crate.IO GmbH (referred to in this notice as "Crate") under one or
+more contributor license agreements.
 
-=========================================================================
+Different parts of CrateDB are available under different licences.
 
-Lucene
-http://lucene.apache.org/
-developed by The Apache Software Foundation
-License: Apache License v2 (http://www.apache.org/licenses)
+Unless otherwise stated, every component of CrateDB is licensed under the
+Apache License, Version 2.0.
 
-=========================================================================
+CrateDB also includes enterprise features. These features are marked in the
+documentation and in their respective source files, and are not licensed under
+the Apache License. To use these components, you must purchase a commercial
+licence agreement with Crate.
 
-Elasticsearch
-http://www.elasticsearch.org/
-developed by Elastic and Shay Banon
-License: Apache License v2 (http://www.apache.org/licenses)
+To enable or use any of the enterprise features, Crate must have given you
+permission to enable and use the Enterprise Edition of CrateDB and you must
+have a valid Enterprise or Subscription Agreement with Crate. If you enable or
+use features that are part of the Enterprise Edition, you represent and warrant
+that you have a valid Enterprise or Subscription Agreement with Crate. Your use
+of features of the Enterprise Edition is governed by the terms and conditions
+of your Enterprise or Subscription Agreement with Crate.
 
-=========================================================================
+Third-party components bundled with the CrateDB source code are listed in the
+LICENSE file along with their respective licenses. Any additional mandatory
+notices pertaining to those dependencies will be reproduced in this file.
 
-Presto (SQL Parser)
-http://prestodb.io
-developed by Facebook (https://github.com/facebook/presto)
-License: Apache License v2 (http://www.apache.org/licenses)
+Crate provides pre-built releases for convenience, also known as convenience
+releases. Building CrateDB from source pulls in a number of additional
+third-party dependencies. Hence, convenience releases will contain a mix of
+CrateDB source code and third-party build-time dependencies not listed in the
+LICENSE file or in this file.
 
-=========================================================================
+Crate is committed to only using permissively licensed third-party code.
+However, for the time being, if you make use of convenience releases, it is
+your responsibility to check the licensing status of the bundled third-party
+build-time dependencies.
 
-Netty
-http://netty.io
-developed by The Netty Project
-License: Apache License v2 (http://www.apache.org/licenses)
 
-=========================================================================
+================================================================================
 
-SRV Discovery Plugin for Elasticsearch
-https://github.com/grantr/elasticsearch-srv-discovery
-developed by Grant Rodgers
-License: MIT License, http://www.opensource.org/licenses/mit-license.php
-
-=========================================================================
-
-AWS Cloud Plugin for Elasticsearch
-https://github.com/elastic/elasticsearch-cloud-aws
-developed by Elastic
-License: Apache License v2 (http://www.apache.org/licenses)
-
-=========================================================================
-
-Meyer CSS reset
-http://meyerweb.com/eric/tools/css/reset/
-License: none (public domain)
-
-=========================================================================
-
-normalize.css
-http://github.com/necolas/normalize.css
-Copyright (c) Nicolas Gallagher and Jonathan Neal
-License: https://github.com/necolas/normalize.css/blob/master/LICENSE.md
-
-=========================================================================
-
-CSS3-mediaqueries.js
-http://code.google.com/p/css3-mediaqueries-js/
-License: MIT License, http://www.opensource.org/licenses/mit-license.php
-
-=========================================================================
-
-jQuery
-Copyright 2012 jQuery Foundation and other contributors
-http://jquery.com
-License: MIT License, http://jquery.org/license/
-
-=========================================================================
-
-Mustache.js
-Copyright (c) 2009 Chris Wanstrath (Ruby)
-Copyright (c) 2010 Jan Lehnardt (JavaScript)
-http://mustache.github.com
-License: MIT License
-
-=========================================================================
-
-Raphael
-http://raphaeljs.com, from fork at git@github.com:mobz/g.raphael.git
-Copyright (c) 2010 Dmitry Baranovskiy
-License: MIT (http://raphaeljs.com/license.htm
-
-=========================================================================
-
-date-range-parser
-https://github.com/mobz/date-range-parser
-Contributed to the Apache Software Foundation by Ben Birch - Aconex
-License: Apache License v2 (http://www.apache.org/licenses)
-
-=========================================================================
-
-Bootstrap
-https://getbootstrap.com
-Copyright 2012 Twitter, Inc.
-License: Apache License v2 (http://www.apache.org/licenses)
-
-=========================================================================
-
-'SB Admin' HTML Template
-http://startbootstrap.com
-Copyright 2013 Iron Summit Media Strategies
-License: Apache License v2 (http://www.apache.org/licenses)
-
-=========================================================================
-
-AngularJS
-http://angularjs.org
-Copyright 2010-2014 Google, Inc
-License: MIT (https://github.com/angular/angular.js/blob/master/LICENSE)
-
-=========================================================================
-
-Various Components of Lovely Systems GmbH
-http://www.lovelysystems.com
-Copyright Lovely Systems GmbH
-License: Apache 2.0 (http://www.apache.org/licenses)
-
-=========================================================================
-
-Apache XBean
-http://geronimo.apache.org/xbean/
-Copyright Apache Software Foundation
-License: Apache License v2 (http://www.apache.org/licenses)
+This product includes software developed by The Apache Software
+Foundation (http://www.apache.org/).