Added Cross-site Request Forgery Prevention config value.
Refactored participant import form to use CHtml::form() instead of <form
Use CHtml::form() in study export form.
Use CHtml::form() in "Import Study" form.
Use CHtml::form() in admin hiddenForm.
Use CHtml::form() in interview hiddenForm.
Use CHtml::form in _form_option_list.
Use CHtml::form() in editOptionForm.
Added CHtml::form() to view_option_list ajaxupdate() and reformatted tabs.
Merge pull request #4 from qualintitative/crosssite_request_form

Merging in Crosssite request form branch.