add WikiPage Model Tests
add WikiPage revisions table schema
add WikiPage test comment(small fix)
restore cake.generic.css
remove WikiPagesController::_changePagesCategory() and add changePagesCategory()
Add WikiPage::getRevision() :return Revision Model.
Update HowToRun.md
Fix redirect process after login.
Add comment.
Fix WikiPagesController::view(). Remove use of WikiPage::isPublic().
Fix CSRF check
Add redirect for login user.
Refactoring
Small fix.