Added logic to check if corp or alliance exists
Avoids attempting to retrieve corp or alliance info for corps or alliances which have closed and deletes the unnecessary models.
Addreses issues #93 (closed) and #68 (closed)
Avoids attempting to retrieve corp or alliance info for corps or alliances which have closed and deletes the unnecessary models.
Addreses issues #93 (closed) and #68 (closed)