Added a note regarding installation on OS X with Xcode 4.3.1+
Added a note regarding installation on OS X with Xcode 4.3.1+

Added a note regarding a work around when trying to install on OS X with the new app based version of Xcode due to an issue with node-gyp not taking into consideration the new path.
ksmyth/node.bcrypt.js,linalu1/node.bcrypt.js,linalu1/node.bcrypt.js,DJMcK/node.bcrypt.js,ncb000gt/node.bcrypt.js,ncb000gt/node.bcrypt.js,linalu1/node.bcrypt.js,kelektiv/node.bcrypt.js,greyhwndz/node.bcrypt.js,DJMcK/node.bcrypt.js,nullivex/node.bcrypt.js,kelektiv/node.bcrypt.js,ksmyth/node.bcrypt.js,kelektiv/node.bcrypt.js,DJMcK/node.bcrypt.js,greyhwndz/node.bcrypt.js,nullivex/node.bcrypt.js,greyhwndz/node.bcrypt.js,ncb000gt/node.bcrypt.js,nullivex/node.bcrypt.js,ncb000gt/node.bcrypt.js,linalu1/node.bcrypt.js,ksmyth/node.bcrypt.js,listepo/node.bcrypt.js,listepo/node.bcrypt.js,listepo/node.bcrypt.js,kelektiv/node.bcrypt.js,ksmyth/node.bcrypt.js,listepo/node.bcrypt.js,greyhwndz/node.bcrypt.js,nullivex/node.bcrypt.js,DJMcK/node.bcrypt.js,kelektiv/node.bcrypt.js