Fixes an issue with empty string conversions to date time - should fail
Merge branch '6.2.0' of https://github.com/umbraco/Umbraco-CMS into 6.2.0
U4-2518 - issue with virtual dir named Umbraco
Merge remote-tracking branch 'origin/6.2.0' into 7.0.0

Conflicts:
	src/Umbraco.Core/ObjectExtensions.cs
Changed the naming to PublishedContentQuery and TagQuery