Major: 0.0.51

Updates:
1. Add basic visual rect code for KNMusicAlbumView.
2. Add KNMusicDetailTooltip class for music information added..
Major: 0.0.52

New Features:
1. Support visualRect() and itemRect().
Major: 0.0.52s

Updates:
1. Merge branch 'master' of https://github.com/Harinlen/Nerve and
solved the conflicts in:
	src/Nerve.pro