Fixed errors in Marketplace

Solved `undefined index[...]` and `invalid argument supplied[...]`
errors in Marketplace.
Delay to character deletion has been added.

When user requests character delete, he will have to wait delay from
config. During this time when user logs in on his account, on website,
player will see information that character is awaiting delete. User can
cancel this operation.
Merge pull request #44 from Kuzirashi/master

Added character deletion delay and fixed errors in Marketplace.