Remove any animated/album posts from the Gallery.

- As animated images require extra logic to display (and not sure ImageLoader will handle)
and same for albums, going to avoid for now; to add in a later release when this all works cool-like.
Adds cursor loader class. Needs integration with adapter.
Adds logs for cursor loader, CS fixes
:x: bedtime. Take a look at GalleryItemCurLoader.loadInBackground.

- it's cyclic so checkout cursor loader in more detail to see what needs to be done, yo
Splits loaders into cursor and api, adds refresh policy
Merge pull request #21 from ataulm/cursor_loader_gallery_item

Cursor loader gallery item
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Merge branch 'cursor_loader_gallery_item' into persist_galleries
Removes album/animated restriction from Gallery model.

- let everything be downloaded and persisted; animated and album posts can be filtered when read from db
Merge pull request #22 from ataulm/persist_galleries

Persist galleries