change spec_helpr.rb
Change Page's url_name validation.
add test case for search page
stubed for activation mail.
Add spec page for search logic
add 'data' directory
moving stubed logic
modified search logic (not finished...)
Add decorators spec file (template)
modified page_decorator
add test case for page search
pending test case of escape search word.
Add test case for wiki_information_decorator_spec.rb
moving page search spec.
change logic private visivilities.
Merge branch 'feature/add_page_spec' into develop