Fixes for thematic_validate_opt()

Fixed: Typo in namespacing of function props josephting
Fixed: Passing validation variable to child theme override
Cleaned Up: thematic_category_archives()

Remove deprecated parameter optioncount from wp_list_categories() props
scottnix
Fix: thematic_content() notice for undefined variable $post

Assign a value to $posts when $thematic_content_length == 'none'

props scottnix