Issue 1019 - Deeplink to NuGet Package Explorer

https://github.com/NuGet/NuGetGallery/issues/1019
Added index timestamp
Patch up some layout stuff when zoomed slightly out
Fixed #2016 by validating that the NuSpec exists in the root of the package
Merge pull request #2066 from NuGet/anurse/2031-layoutwhenzoomedout

Patch up some layout stuff when zoomed slightly out
Code Review Feedback
Did that CSS-s-s-s-s-s up right.
Done that timeago o o o o up right?
Merge pull request #2068 from NuGet/anurse/2016-nuspecvalidationistooloose

Fixed #2016 by validating that the NuSpec exists in the root of the package
Some minor layout tweaks and IE-only-ficiation
Word wrap shmord shrap
Appease FxCop
Merge branch 'anurse/2033-indextimestamp'

Conflicts:
	src/NuGetGallery/Views/Shared/ListPackages.cshtml
Merge pull request #2073 from NuGet/anurse/1019-npedeeplink

Fix #1019 by adding NPE Deep Link
Merge branch 'anurse/2008-commitmetadata'

Conflicts:
	src/NuGetGallery/ExtensionMethods.cs