Error is now displayed if the game doesnt load
Changes to the storage manager

The game now maintains a storage manager version. If this is not equal
to the version in the cookie the cookie is wiped. This removes the
requirement to clear cookies when a new storage format is released.

Also disabled the "Remove" game mode because its is not implemented yet.
Merge pull request #2 from tommykent1210/nightly

Changes to storage manager and game menu