Fix set_block for LoadMoreButton and make switching to songsview
not crash
Add fixes to albumArtCache

Signed-off-by: Seif Lotfy <seif@lotfy.com>
Add fixes to view (so the other views show up)

Signed-off-by: Seif Lotfy <seif@lotfy.com>
Other small fixes to widgets
Fix formatting of time
Merge pull request #39 from kyoushuu/master

Fix set_block for LoadMoreButton and make switching to songsview (rebased seif's patches)
fix selection bar
Fix back button for albums view
correctly exit after closing the window
toolbar: make pep8 happy