doc: add a license, use correct SPDX, add context

LICENSE

@@ -0,0 +1,22 @@
+Copyright (c) 2013-2016, Forrest L Norvell <ogd@aoaioxxysz.net>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. 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 OWNER 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.

README.md

@@ -241,8 +241,20 @@ setInterval(function () {
 
 A context is a plain object created using the enclosing context as its prototype.
 
-[timer functions]: timers.html
-[setImmediate]:    timers.html#timers_setimmediate_callback_arg
-[setTimeout]:      timers.html#timers_settimeout_callback_delay_arg
-[setInterval]:     timers.html#timers_setinterval_callback_delay_arg
+# copyright & license
+
+See [LICENSE](https://github.com/othiym23/node-continuation-local-storage/blob/master/LICENSE)
+for the details of the BSD 2-clause "simplified" license used by
+`continuation-local-storage`. This package was developed in 2012-2013 (and is
+maintained now) by Forrest L Norvell, [@othiym23](https://github.com/othiym23),
+with considerable help from Timothy Caswell,
+[@creationix](https://github.com/creationix), working for The Node Firm. This
+work was underwritten by New Relic for use in their Node.js instrumentation
+agent, so maybe give that a look if you have some Node.js
+performance-monitoring needs.
+
+[timer functions]: https://nodejs.org/api/timers.html
+[setImmediate]:    https://nodejs.org/api/timers.html#timers_setimmediate_callback_arg
+[setTimeout]:      https://nodejs.org/api/timers.html#timers_settimeout_callback_delay_arg
+[setInterval]:     https://nodejs.org/api/timers.html#timers_setinterval_callback_delay_arg
 [cps]:             http://en.wikipedia.org/wiki/Continuation-passing_style

package.json

@@ -26,7 +26,7 @@
     "Tim Caswell <tim@creationix.com>",
     "Forrest L Norvell <ogd@aoaioxxysz.net>"
   ],
-  "license": "BSD",
+  "license": "BSD-2-Clause",
   "devDependencies": {
     "tap": "^5.2.0"
   },