Update MonoTouch.Dialog/DialogViewController.cs
Merge pull request #134 from versus1985/master

Adding a IB-compatible constructor for DialogViewController
Docs
Fix type lookup
RadioElement: Fix from Stuart Carnie (scarnie/github.com) to handle cases where the Selection is invalid on the container
A different way to always return the value from the entry, this time without the event handler, which caused Secure entry lines to behave differently
Fix build
StyledStringElement: don't crash if the cell doesn't have an image view. Fixes #5314.
Use NSUrlConnection to download data, to avoid bringing the Http/ssl stack by default for Json users
Fixed VS compilation error (with Nullable types)
DialogViewController: Expose the Pushing property
Merge pull request #143 from viniciusjarina/fix_vs_compilation

Fixed VS compilation error (with Nullable types)
Revert the changes from Jarina, and properly apply the null changes
Fix crash in UIWebViewWebViewDelegate webView:identifierForInitialRequest #6152

It turns out to be a rather common problem. Some view controller hierarchy
don't call View[Did|Will][Disa|A]ppear methods [1]. Workarounds exists but
MT.D can be used in several conditions.

A different fix is to avoid depending ViewWillDisappear and dispose of the
UIWebView asap. This has the indirect benefit that we can also avoid (by
using the same condition) creating unrequired UIActivityIndicatorView (i.e.
use one per `LoadRequest` not one per `LoadStarted`).

[1] http://cocoa.agilemonks.com/2011/02/19/uinavigationcontroller-doesnt-call-viewwillappear-or-viewwilldisappear/
Update MonoTouch.Dialog/Utilities/ImageLoader.cs

Make sure second request gets notification when the image is loaded.
Update MonoTouch.Dialog/Utilities/ImageLoader.cs
Update MonoTouch.Dialog/Utilities/ImageLoader.cs

URI should be html encoded
Update MonoTouch.Dialog/Utilities/ImageLoader.cs
Use format tag in docs
Update MonoTouch.Dialog/Utilities/ImageLoader.cs

Fix: Make sure target filename is updated when dealing with requests queued on the request queue.
Bug description: If all download threads are in use, a request is added to the request queue. When one of the download threads is free, it will pop the request from the request queue and start download it, but the target filename is incorrectly set to the path to the first download ever initiated by the download thread.