re-installs mvc, webapi and ensures running the latest 2.0.x versions of webpages and razor, now all proj's are consistent with correct versions referenced and copy local set correctly.
Merge remote-tracking branch 'origin/6.2.2' into 7.1.5

Conflicts:
	src/SQLCE4Umbraco/SqlCE4Umbraco.csproj
	src/SQLCE4Umbraco/app.config
	src/Umbraco.Core/app.config
	src/Umbraco.Tests/App.config
	src/Umbraco.Web.UI/Umbraco.Web.UI.csproj
	src/Umbraco.Web/Umbraco.Web.csproj
	src/Umbraco.Web/app.config
	src/umbraco.MacroEngines/App.Config
	src/umbraco.businesslogic/app.config
	src/umbraco.datalayer/app.config
	src/umbraco.editorControls/app.config
Uninstalls package CodeSharp.Package.AspNetWebPage and removes refs to Nuget.Core and Webpages.Administration - neither of which are used anywhere... but we've been shipping Umbraco with them for some reason.
All nuget refs are now up to date and installed correctly with copy local set correctly for all non gac 4.5 assemblies as well as the specific version attribute.
updates nuspec to have latest versions for all dependencies
updates nuspec to have latest versions for all dependencies
updates proj's with correct specific version attributes
Merge remote-tracking branch 'origin/6.2.2' into 7.1.5

Conflicts:
	src/Umbraco.Web/Umbraco.Web.csproj
Fixes: U4-4738 Backoffice search should support node ID search