[LMP] Added MediaInfo::Additional_ field.
[LMP] Set local path according to current source.

Fixes #1240.
[LMP] Don't use stringlists.
[LMP] Handle custom media info data in AudioPropsWidget.
[LMP] Added min/max/nominal bitrate.
[LMP] Fixed code style.
[LMP] Added songInfoUpdated() signal.
[LMP] Handle songInfoUpdated in NP widget.
[LMP] Refactored volume controlling for #1241.
[LMP] Timer-based volume notifications for #1241.
[Kinotify] Added IDs to the widgets.
[Kinotify] Update notifications iff ID match.
[LMP] ID-ful volume notifications. Fixes #1241.
[Launchy] Use own settings instead of messing with LMP.
[XSD] Removed useless check.
[XSD] Support {LCDIR} for Path items for #1239.
[LMP] Configurable album art storage path, closes #1239.
[LMP] Slightly fixed code style.
[LMP] Late-assign source media info.