Added logic to allow visibility of chosen fields if user is logged-in.
New Field properties: visibleToLoggedIn, visibleToLoggedInCap
Refactored the method remove_admin_only (new method: remove_hidden_fields)
Adds search criterias and filter box
Added a new field property - isSearchFilter - to add search filters to search box.
If search is disabled, hide label and input for default search, when there are some fields marked as Search Filters.
Merge pull request #2 from luistinygod/master

Added logic to allow visibility of chosen fields if user is logged-in.