Refactored cChatColor

- Changed std::string fields to const char-pointers in order to wipe out potential issues with static initialization and global destructors
- Deprecated cChatColor::Color() because the name does not match the value
Removed references to deprecated cChatColor::Color
Fixed attempts to call c_str on ChatColors
ChatColor.h: The @deprecated tag slipped. Oops.
Merge pull request #1213 from mc-server/chat-color

Refactored cChatColor