Added meta form field for collection, #218.

Signed-off-by: Zane M. Kolnik <zanematthew@gmail.com>
Start of query check for password protected items, #218.

Signed-off-by: Zane M. Kolnik <zanematthew@gmail.com>
Merge branch 'refs/heads/dev' into issue-218
Working for single item and collections, password protected images on archive pages still need to be filtered out, cleaned comments.

Signed-off-by: Zane M. Kolnik <zanematthew@gmail.com>
Password proteced collections are filter from the archive and home page, also moved code into sell media class
filtering items on the home page and taxonomy pages
filtering results on single page
added check for single post