Merge pull request #1730 from NuGet/qa

Qa -> Staging
Updated to NuGet.Core 2.7.2 and added script for generating test packages
Updated to JSON.Net 5.0.8
Updated Glimpse to 1.8.0
Updated to Owin 2.0.2
Added some additional validation
Fix #1680 by tweaking the thanks page
Fix #1679 by cleaning up the latest markers
Fix code review feedback
Fix #1745 by showing error if minClientVersion > current NuGet version
Fix #1670 by improving WebMatrix curation
Updating NuGet restore to use package restore mechanism from NuGet 2.7
Merge pull request #1767 from NuGet/qa

Qa -> Staging
Avoid flooding elmah logs with stats related errors
Fixed error message in ReportMypackage form
Fix CSS glitch on packages page
Merge pull request #1765 from pranavkm/NuGet_Restore

Updating NuGet restore to use package restore mechanism from NuGet 2.7
Added load tests in to functional tests repo
Removed the duplicate code in V2FeedTest,cs
Moving the localtest.me instructions up and correcting them