1. On Job detail page, we need to give an option "Chat" with job poster.
2. User can send messages even if job poster is not online and he'll receive those when he comes online again.
3. If job poster is online, he'll receive right away and both can chat.
4. If user accepts a job, a contact list will be developed and both users will be added in each others contact list
5. A new page contact list will be developed where all contacts would be shown and user can chat anytime