Renamed "common" script to "checkbox".
Remove "common" script.
Renamed "posts_search" and "posts_filter".
Remove "posts_search" and "posts_filter".
Change "filter" and "search" elements.
Add trash status for count.
Change type.
Add Comments/filter element.
Add "admin_filter" method, fixed #17.
Add "filter.ctp" element for comments view.