fixed #497 Facebook Comment
fixed #499 project が削除できない。
Merge pull request #498 from dadaa/497

fixed #497 Facebook Comment
Merge pull request #500 from dadaa/499

fixed #499 project が削除できない。
add some specs for forking
Merge pull request #508 from johnny-miyake/add_specs_for_forking

add some specs for forking