Revert "prototype rc2"

This reverts commit c4e0ad19899bcb1789e49293fbab54bffe233e0a.
Revert "prototype spin.js"

This reverts commit 7ccf3599d6ecbe623e7b0b84cbf92ee06c6d4c54.
Revert "prototype rc版"

This reverts commit 9938d9ed30d2f3cd86a1fbbd60a97e4bd2e08450.
Revert "prototype spin.jsを利用してみた"

This reverts commit 28cad2f7b62eb6ac951de11891872e35534cb33b.