Changed price lookup delimiter

- `price <item name>,[system name]` is now `price <item name>@[system name]`  
(20:02:31) nick_delorean: or @  
(20:02:42) joker_gates: hmmmm i like @  
(20:02:45) ektony_: actually @ should be separator for system
- Increased timeouts (API servers can have a quite high response time when they face heay load)