-Fixed incorrect NuGet targets on portable assembly
-Fixed using JTokenEqualityComparer with JProperties that have no value
-Fixed build
-Fixed MetadataHandling.ReadAhead bugs
-Added MetadataPropertyHandling.Ignore
-Incremented version to 6.0.4
-Removed unused file
-Documentation
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of github.com:Schumix/Newtonsoft.Json