First version of the clamp node
Setting defaults in plug constructors
Using the recommended method of comparing the ancestor of the input to the plug
Updating to use iterators, updating testing logic to be more clear
switching to use isAncestorOf as suggested, in order to avoid the ancestor call which apparently can trigger an evaluation through python
adding a doxygen comment and fixing some tabbing issues
Updating the code for compatibility with Cortex pull request 160.

We should make sure the pull request in Cortex go first.
Fixed typo in comment.
Fixed SectionedCompoundDataPlugValueWidget child widget bugs.

It wasn't implementing childPlugValueWidget(), or setReadOnly(), both of which are required for any PlugValueWidgets which have PlugValueWidget children.

Fixes #588.
Fixed Dialogue positioning and focussing on Linux.

Fixes #220. Fixes #642. I suspect this could also sort out #62, but that needs to be verified by a KDE user.
Fixed PrimitiveVariableProcessor::affects().

It was neglecting to call the base class.
Added DeleteAttributes node to GafferScene.

This derives from a new AttributeProcessor base class which simplifies the development of other nodes which solely process the values of certain named attributes. Also moved the bindings for all the attributes nodes into a separate file - the GafferSceneModule.cpp compile times are ridiculous, so we'll need to continue to split off logical groupings of nodes into separate functions like this until they're not so ridiculous.

Fixes #587.
Merge pull request #643 from johnhaddon/sectionedChildWidgets

Fixed SectionedCompoundDataPlugValueWidget child widget bugs.
Merge pull request #644 from johnhaddon/dialoguePositioning

Fixed Dialogue positioning and focussing on Linux.
Merge pull request #645 from johnhaddon/deleteAttributes

DeleteAttributes node
Fixed RenderManShader.acceptsInput() crash

RenderManShader.acceptsInput used to crash when you called acceptsInput( None ) on one of its input plugs. This was bad. Now it doesn't. This is good.
added some checks for null plugs in Box's plug promotion methods
Merge pull request #647 from davidsminor/renderManShaderAcceptsInputFix

Fixed some null plug crashes
Bumped version to 0.85.0 and updated Changes
updating default Cortex version for public build