(change:major) Removed the 'Browse' operation (it is performed inside both 'Browse Categories' and 'Browse Regions' operations).
(change:minor) Removed useless logged user stuff in the 'Browse Categories in Region' operation.
(change:major) Removed 'Browse Categories in Region' operation. It has been joined with the 'Browse Region' operation.
(change:minor) Improved doc.
(change:major) Generate a random user if no user is logged in. Improved doc.
(change:minor) Code clean-up. Improved doc.
(change:major) Added emulation of 'go to the browse home page' request. Code clean-up. Improved doc.
(change:major) Generate a random user if not user is logged in. Improved doc.
(change:minor) Code clean-up. Improved doc.
(change:minor) Improved doc.
(change:minor) Code clean-up. Improved doc.
(change:minor) Code clean-up.
(change:minor) Code clean-up. Improved doc.
(change:minor) Improved doc.
(change:minor) Improved doc.
(change:major) Generate a random user if not user is logged in. Improved doc.