Fix for NSNull with default values
changelog
Merge pull request #932 from realm/al-nsnull

Fix for NSNull with default values
support subclassing
typo/changelog
changelog
Merge pull request #940 from realm/al-subclass

Support subclassing RLMObjects
Don't throw an exception when -description is called on a deleted object

Seems friendlier to just return a description indicating that the object is
deleted instead.

Closes #926.
Merge pull request #941 from realm/tg-deleted-object-description

Don't throw an exception when -description is called on a deleted object
merge master