Initial support for path-based tag hierarchy. Change your hierarchy type in the settings.
Merge branch 'tag_hierarchy' into atlas

Conflicts:
	src/Assembly/Helpers/Settings.cs
	src/Assembly/Metro/Controls/PageTemplates/Games/Components/MetaContainer.xaml.cs
	src/Assembly/Metro/Controls/PageTemplates/Games/HaloMap.xaml.cs
	src/Assembly/Metro/Controls/PageTemplates/SettingsPage.xaml