Fixes issue with path reference queries
Started expanding out IMdPath for navigational elements
Merge remote-tracking branch 'origin/master'

Conflicts:
	Tests/ExamineMd.Tests.UnitTests/Search/MarkdownQueryTests.cs
	src/ExamineMd.Web.UI/App_Plugins/ExamineMd/Views/Base.cshtml
	src/ExamineMd/Models/VirtualMarkdownDocument.cs
	src/ExamineMd/Search/MarkdownQuery.cs
	src/UmbracoCms/UmbracoCms.7.1.8/App_Data/Umbraco.sdf
	src/UmbracoCms/UmbracoCms.7.1.8/App_Plugins/ExamineMd/Views/Base.cshtml
	src/UmbracoCms/UmbracoCms.7.1.8/bin/ExamineMd.dll