Develop

My modification is in /public and /views.
Modification in other folders are for testing only, except the "require 'json'" added in lib/ocp_registry.rb.
Folder /public/old and /views/old contains the old view files. There are of no use now and can be deleted. I kept them here just for referencing. 

I have done testing on the view part. But your testing will make me more ensured.

=============================================================================

There is some problem I now just walk-around:
1. In view/base.erb:line-13, I need to know who said the comment. Currently I just use rand() to generate the speaker.