Fix for #1041. UIKit methods cannot be invoked off main thread. We need to wrap those when called in an async context.

Add javaReference/transfer constructors to fragments

Renaming "GroupItemTemplate" android attribute to "MvxGroupItemTemplate"

This reverts commit 4bcd03cb.

Properly inflate android.widget classes

PhoneLayoutInflater isn't exposed so MvxLayoutInflater has to inherit from LayoutInflater.
In this case we need to mimic PhoneLayoutInflater.OnCreateView.

Every other layout inflater out there seems to do this as well.

Fixes inflation of ViewStubs and ScrollViews in dialogs in release as they could get linked out.

Exception for missing resource Id : Android.Resource.Id.TabHost

MvxBindingAttributes.xml : Renaming "GroupItemTemplate" android attri…

"GroupItemTemplate" android attribute has been renamed to "MvxGroupItemTemplate" to match the current naming convention that uses "Mvx" prefix for android attribute.

Merge pull request #996 into 3.5

Conflicts:
	Cirrious/Cirrious.MvvmCross.Droid.Fragging/MvxCachingFragmentActivity.cs
	Cirrious/Cirrious.MvvmCross.Droid.FullFragging/MvxCachingFragmentActivity.cs

3.5 downloadcache all async

Location plugin provides event to track permission now

DeselectRow support in base UITableViewSource

Configurable root folder for WPF file store

Generic MvxCachingFragmentActivity

Adding Close Hint support for MvxConsole

Added dialogTitle for Android Chooser. Short XML doc and attachment logic cleanup

Inflation fixes final

Fixes Casting for SelectedElement on UISegmentedControl

Fixes a problem with the Xamarin Unified API, which occurs when trying to execute a binding for SelectedElement on an UISegmentedControl ("Unable to cast object of type 'System.nint' to type 'System.Int32'").

FileStore is async with CancellationToken support on all platforms

Previously we would set a custom factory on the context's LayoutInflater that
would catch all inflation requests.  This prevented other Factories from getting
a chance to run.  For example AppCompat wouldn't get a chance to inflate custom
views.

This change introduces our own MvxLayoutInflater that wraps all the possible
entry-points (via custom Factory implementations) delegating to any set
factories and allowing us to bind after any custom factories have finished.

This distinction will be important in the next commit.