Fix flatten function (bug introduce by coffee migration)

lib/utils.coffee

@@ -1,18 +1,25 @@
 
-module.exports.pad = (n, size) ->
-    n = n.toString()
-    pad = ''
-    size = size - n.length
-    for i in [0 .. size]
-        pad += ' '
-    n + pad
+path = require 'path'
 
-module.exports.flatten = (arr, ret) ->
-  ret ?= []
-  len = arr.length
-  for i in [0 .. len]
-    if Array.isArray arr[i]
-      exports.flatten arr[i], ret
-    else
-      ret.push arr[i]
-  ret
+module.exports =
+    pad: (n, size) ->
+        n = n.toString()
+        pad = ''
+        size = size - n.length
+        for i in [0 .. size]
+            pad += ' '
+        n + pad
+    flatten: (arr, ret) ->
+        ret ?= []
+        for i in [0 ... arr.length]
+            if Array.isArray arr[i]
+                @flatten arr[i], ret
+            else
+                ret.push arr[i]
+        ret
+    # Discovery the project root directory or return null if undiscoverable
+    workspace: () ->
+        dirs = require('module')._nodeModulePaths process.cwd()
+        for dir in dirs
+            if path.existsSync(dir) || path.existsSync(path.normalize(dir + '/../package.json'))
+                return path.normalize dir + '/..'