[Add] website: add new table format snippet in website side view

<b>Add Table Snippet:</b> Write product description in table format View like: http://goo.gl/KKI8CW

<b>Task:</b> https://www.odoo.com/web?#id=8713&view_type=form&model=project.task&action=327
<b>Pad:</b>  https://pad.odoo.com/p/openerp-project.task-3ATOK3V0AO