[models] add tracks fetched property for albums and album artist
[KANDisc] fixed bug related to albums with same name
[utils] improved sectionTitleForString
[artist model] fixed predicate for tracks fetched property
[nav controller] added root tvc helper
[base tvc] added initWithPredicate
[KANTableViewCell] initial commit with implementation
[base tvc] added required sort descriptor for sectionTitle
[vendor] added AFNetworking
[vendor] added base64 submodule
[api] reenabled methods that used base64
[xcode] misc.