Switch to using Newtonsoft.Json nuget package
Add location watcher plugin for WPF.
Added AsyncRequestHandle class, to support request cancel in future.
Fix null exception after Windows Phone location watcher stop
Merge pull request #641 from kohlerb/v3.1

Fix null exception after Windows Phone location watcher stop
stream usings in windows store - fixes #638
Merge branch 'v3.1' of github.com:slodge/MvvmCross into v3.1
Merge pull request #634 from wedkarz/v3.1

Add AsyncRequestHandle class, to support request cancel in future.
Follow up to #634
Better Apache 2.0 credit
Merge pull request #632 from AlanYost/v3.1

Add location watcher plugin for WPF.
stop fixes for #632
Removed non-IDisposable Dispose from #632 - shouldn't really use Dispose outside of IDisposable and this public method would have been hard to locate/use from client code (especially shared PCL code)
Build and nuspec fixes for #632
Goodbyte NewtonSoft.Json ... Hello NewtonSoft.Json from Nuget
Nuspec Todo changes - addressing #562
Minor nuspec and packages updates
Virtual changes for #531 - still need to find out if a PR is coming or whether to integrate directly
Fix for users without IMvxCommandHelper (e.g. tests)
CommandCollection and tests - fixes #531