* Add three state (include/exclude/ignore) search filters (works for now only on MangaFox and MangaHere)
* checkbox icons in xml format
* fix checkbox icons referencing
* fix three states filters in remaining catalogs
* use Spinner for filter with more than three states (Mangasee)
* use EditText for freetext filters (Mangasee)
* remove pngs
* Filter class/subclass
* add Filter.Header
* English catalogs
