documentation: add licensing information

Author: atqy

LICENSE.txt

@@ -173,3 +173,21 @@
       of your accepting any such warranty or additional liability.
 
    END OF TERMS AND CONDITIONS
+
+   ======================================================================================
+    Amazon SageMaker Examples Subcomponents:
+
+    The Amazon SageMaker Examples project contains subcomponents with separate
+    copyright notices and license terms. Your use of the source code for the
+    these subcomponents is subject to the terms and conditions of the following
+    licenses. See licenses/ for text of these licenses.
+
+    If a folder hierarchy is listed as subcomponent, separate listings of
+    further subcomponents (files or folder hierarchies) part of the hierarchy
+    take precedence.
+
+    =======================================================================================
+    2-clause BSD license
+    =======================================================================================
+    _static/kendrasearchtools.js
+    _templates/search.html

licenses/2-CLAUSE-BSD

@@ -0,0 +1,28 @@
+2-Clause BSD License
+=====================
+
+Copyright (c) 2007-2020 by the Sphinx team (see AUTHORS file).
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.