Added a link to node-gyp.
Added a link to node-gyp.

Because node-gyp is a dependency for building this module, it makes sense to link directly to the project itself.
Users should read the dependencies of this project without us having to duplicate the information here (plus if the deps change, it'll be good for them to find them on that project page).
DJMcK/node.bcrypt.js,listepo/node.bcrypt.js,linalu1/node.bcrypt.js,greyhwndz/node.bcrypt.js,kelektiv/node.bcrypt.js,kelektiv/node.bcrypt.js,linalu1/node.bcrypt.js,listepo/node.bcrypt.js,ksmyth/node.bcrypt.js,nullivex/node.bcrypt.js,ksmyth/node.bcrypt.js,nullivex/node.bcrypt.js,greyhwndz/node.bcrypt.js,greyhwndz/node.bcrypt.js,ncb000gt/node.bcrypt.js,ncb000gt/node.bcrypt.js,linalu1/node.bcrypt.js,greyhwndz/node.bcrypt.js,listepo/node.bcrypt.js,ncb000gt/node.bcrypt.js,nullivex/node.bcrypt.js,ksmyth/node.bcrypt.js,nullivex/node.bcrypt.js,linalu1/node.bcrypt.js,listepo/node.bcrypt.js,ksmyth/node.bcrypt.js,kelektiv/node.bcrypt.js,kelektiv/node.bcrypt.js,DJMcK/node.bcrypt.js,kelektiv/node.bcrypt.js,DJMcK/node.bcrypt.js,DJMcK/node.bcrypt.js,ncb000gt/node.bcrypt.js