Add description of license conditions

Author: takluyver

Diff for: COPYING.md

@@ -0,0 +1,33 @@
+The logos of projects which have endorsed the statement are used with the
+permission of the projects they represent. They are not covered by any of the
+licenses granted by this project.
+
+The project uses the [SinglePaged template](https://github.com/t413/SinglePaged),
+which is under the MIT license:
+
+    Copyright (c) 2014 Tim O'Brien (t413)
+
+    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.
+
+Any example computer code created for this project is published under a
+[CC0 license](https://creativecommons.org/publicdomain/zero/1.0/), meaning it
+can be used with no conditions.
+
+Content not mentioned above (principally the text of the website), is published
+under the [CC-BY license](https://creativecommons.org/licenses/by/4.0/).