use node-gyp instead of node-waf

binding.gyp

@@ -0,0 +1,10 @@
+{
+  "targets": [
+    {
+      "target_name": "nroonga_bindings",
+      "sources": [ "src/nroonga.cc" ],
+      "include_dirs": ["<!@(pkg-config --cflags-only-I groonga | sed -e 's/-I//g')"],
+      "libraries": ["<!@(pkg-config --libs-only-l groonga)"]
+    }
+  ]
+}

lib/nroonga.js

@@ -1,7 +1,7 @@
 (function() {
   var msgpack, nroonga, optionsToCommandString, overrideOutputType;
 
-  nroonga = module.exports = require('./nroonga_bindings.node');
+  nroonga = module.exports = require('../build/Release/nroonga_bindings.node');
 
   msgpack = require('msgpack2');
 

package.json

@@ -21,10 +21,11 @@
   },
   "scripts": {
     "test": "expresso",
-    "watch": "coffee -c -w -o lib src"
+    "watch": "coffee -c -w -o lib src",
+    "install": "node-gyp rebuild"
   },
   "main": "./lib/nroonga",
   "engines": {
-    "node": "~ 0.6.9"
+    "node": "~ 0.6.15"
   }
 }

src/nroonga.coffee

@@ -1,4 +1,4 @@
-nroonga = module.exports = require('./nroonga_bindings.node')
+nroonga = module.exports = require('../build/Release/nroonga_bindings.node')
 msgpack = require('msgpack2')
 
 optionsToCommandString = (command, options) ->