Merge pull request rvagg#1 from nevosegal/link-to-gyp

Updated link to gyp user documentation

Author: nevosegal

README.md

@@ -132,8 +132,8 @@ Some additional resources for addons and writing `gyp` files:
 
  * ["Going Native" a nodeschool.io tutorial](http://nodeschool.io/#goingnative)
  * ["Hello World" node addon example](https://github.com/joyent/node/tree/master/test/addons/hello-world)
- * [gyp user documentation](http://code.google.com/p/gyp/wiki/GypUserDocumentation)
- * [gyp input format reference](http://code.google.com/p/gyp/wiki/InputFormatReference)
+ * [gyp user documentation](https://chromium.googlesource.com/external/gyp/+/master/docs/UserDocumentation.md)
+ * [gyp input format reference](https://chromium.googlesource.com/external/gyp/+/master/docs/InputFormatReference.md)
  * [*"binding.gyp" files out in the wild* wiki page](https://github.com/TooTallNate/node-gyp/wiki/%22binding.gyp%22-files-out-in-the-wild)