| diff --git b/LICENSE a/LICENSE | 
 | new file mode 100644 | 
 | index 0000000..c044775 | 
 | --- /dev/null | 
 | +++ a/LICENSE | 
 | @@ -0,0 +1,23 @@ | 
 | +Copyright (C) 2018-2019, Cloudflare, Inc. | 
 | +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 <COPYRIGHT HOLDER> 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. |