Remove the duplicated configuration.
Add the audit logs for deposit and withdraw.
Merge branch 'master' into audit_log

Conflicts:
	db/schema.rb
Updated the annoate.
Move the audit related model to audit folder.
Move the audit reloated class to the right context.
After a long talk with Jan. We make a decison that.
1. Use Member.current instead of get current_user from controller.
2. So no need use Sweeper and use standard observer.
Add tests for the audit log related stuff.
Fixed display account version data at admin panel
Merge pull request #121 from peatio/audit_log

Add audit log to Peatio
Merge branch 'master' into ticket_system