Add feature flag for running in "launch image mode"

This allows me to avoid keeping commented-out code in Git
extract a magic number to a timeout property
Update app kill alert message
Rearrange/clean up app delegate
Add a music tracker

Currently, just alert the user with whatever is playing
add example auth plist
Pull in last.fm client stuff from SNRMusicKit

https://github.com/indragiek/SNRMusicKit/tree/master/Other%20Services
as of https://github.com/indragiek/SNRMusicKit/commit/655cfb5433a4b45a0c242eb60818018992894ce1
update Podfile to iOS 7.0 target
update AFNetworking
add license (MIT)