Add fs.split

spec/stdlib/fs-spec.coffee

@@ -41,6 +41,11 @@ describe "fs", ->
       expect(fs.join('/a/b/', 'c', 'd')).toBe '/a/b/c/d'
       expect(fs.join('a', 'b/c/', 'd/')).toBe 'a/b/c/d/'
 
+  describe ".split(path)", ->
+    it "returns path components", ->
+      expect(fs.split("/a/b/c.txt")).toEqual ["", "a", "b", "c.txt"]
+      expect(fs.split("a/b/c.txt")).toEqual ["a", "b", "c.txt"]
+
   describe ".extension(path)", ->
     it "returns the extension of a file", ->
       expect(fs.extension("a/b/corey.txt")).toBe '.txt'

src/stdlib/fs.coffee

@@ -77,6 +77,15 @@ module.exports =
   read: (path) ->
     $native.read(path)
 
+  # Returns an array of path components. If the path is absolute, the first
+  # component will be an indicator of the root of the file system; for file
+  # systems with drives (such as Windows), this is the drive identifier with a
+  # colon, like "c:"; on Unix, this is an empty string "". The intent is that
+  # calling "join.apply" with the result of "split" as arguments will
+  # reconstruct the path.
+  split: (path) ->
+    path.split("/")
+
   # Open, write, flush, and close a file, writing the given content.
   write: (path, content) ->
     $native.write(path, content)