Add support for C++11 on Mac

binding.gyp

@@ -15,7 +15,9 @@
     'cflags': ['-fexceptions', '-Wall', '-O3'],
     'cflags_cc': ['-std=c++0x', '-fexceptions', '-Wall', '-O3'],
     'xcode_settings': {
-      'OTHER_CFLAGS': ['-std=c++11', '-fexceptions', '-Wall', '-O3']
+      'OTHER_CFLAGS': ['-std=c++11', '-stdlib=libc++', '-fexceptions', '-Wall', '-O3'],
+      'OTHER_CPLUSPLUSFLAGS': ['-std=c++11', '-stdlib=libc++', '-fexceptions', '-Wall', '-O3'],
+      'MACOSX_DEPLOYMENT_TARGET': '10.7'
     }
   }]
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sharp",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "author": "Lovell Fuller <npm@lovell.info>",
   "contributors": [
     "Pierre Inglebert <pierre.inglebert@gmail.com>",
@@ -35,7 +35,7 @@
   ],
   "dependencies": {
     "nan": "^1.3.0",
-    "bluebird": "^2.3.0"
+    "bluebird": "^2.3.1"
   },
   "devDependencies": {
     "imagemagick": "^0.1.3",