upgrade coffeescript to 1.4.0
Revert "renamed execjs-1.4.0 to execjs-1.4.0-patched"

This reverts commit 58f635ca238d0e4ee62c3fd340c7bab53fc20058.
Revert "fixed #88 , patch execjs for windows8"

This reverts commit 8e8eaa28c0a943046178ca3884f7b1dd2e2c54ee.
bundle nodejs for windows