Version 0.93
* Fixed several issues with FormBased authentication
* New FormbasedAuthenticationRequiredException, which is thrown when an attempt is made to access an item which requires form based authentication.
* Moved the DangerousSetAccess method from the ExchangeSecurity to the ItemSecurity
* Added a DangererousSetAccess method to the FolderSecurity class.
* Fixed an error in the ItemSecurity.SetAccess(AccessMasks) and FolderSecurity.SetAccess(AccessMasks) method (NullReferenceException).
* All methods calling event handler (OnRefreshCompleted, etc.) are now "protected virtual"
* Added Attachment handling (via the Item.Attachments property). Attachments can be enumerated, added and removed.
* All EventHandler<ProgressChangedEventArgs<RequestStatus>> have been replaced with a ProgressChangedEventHandler<RequestStatus>
* The RefreshScope has been removed
* The RefreshStatus has been removed
* The Refresh operations of the Item class do not have a parameter any longer
* RequestStatus.BeginningFormBasedAuthentication renamed to RequestStatus.PerformingFormBasedAuthentication.
* The Item class now has a GetContent/GetContentAsync and a SetContent/SetContentAsync methods operation which allow downloading/setting the the MIME content of the item.

Version 0.92
* Fixed a bug in the PropertyCollection.Contains method
* Added several TryGetProperty and TryGetMultiValuedProperty methods to the PropertyValueCollection
* Added GetSecurity() methods to the Item and Folder class, which provides access to the security descriptor of that item
* Added classes for manipulation of the security descriptors of an item

Version 0.91
* Properties are now strongly typed. Single-Valued properties are of type Property<T> and 
	multivalued properties are of type MultiValuedProperty<T>
* Removed the IsMultiValued and Type properties from the Property class
* On a refresh operation, the HTTP result is now reflected in each property.
* The Properties collection now contains properties which could not be successfully loaded.
	Those properties are of type Property and have a Property.Status.StatusCode != 
	HttpStatusCode.Ok.
* When a property is accessed via the Item.Properties indexer or any other of the 
	GetProperty<T> or GetMultiValuedProperty<T> methods, an exception is thrown, whenever
	the Property.Status.StatusCode != HttpStatusCode.Ok.

Version 0.9
* Initial Release