New Features:
- Lazy Connect
- Lazy Mix
- Delete Unused Nodes
- Swap Outputs
- Reset Backdrop
- Add UV Layout attribute node
- Add Vertex Color attribute node
- Shader Viewer
- Frame Selected Nodes (wrap nodes in frame)
- Reload all images
- Modify Labels

Modified features:
- Switch Node Type - now every node's type can be changed to any other.
Links will be preserved whenever possible.

All old and new features documented on wiki page:
http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Nodes/Nodes_
Efficiency_Tools

Added Subsurface passes to be taken into account in addon's operators.

Changed order of 'Swap Shaders' list to match current order in 'Add Shader' menu.

Fix in 'Merge Nodes' to prevent creating cyclic dependencies when nodes to be marged are linked between one another.

In 'Detach Outputs' invoke translate operator after all other operations. This gives same behavior as we have in 'Detach Node' operator

1. Detach Outputs (Shift Alt D): Detaches Outputs leaving inputs linked.
2. Link to Output Node (O): Links active node to tree output node. Output node is 'Composite' node or 'Material Output', 'Lamo Output' or 'World Output'.

In 'Swap Nodes' when swapping shaders - sockets' default value is passed when names of old and new nodes' sockets match

In 'Merge Nodes' when first selected node is linked to anything - last added merging node will be linked to the same sockets. This gives possibility to kind of 'insert' merges into existing noodle.

Changed axes in 'Align Nodes'. Reverted unwanted change introduced when cleaning the code. Now 'Align Horizontally' is the equivelent of s -> x -> 0 with even spacing and 'Vertically': s -> y -> 0 with even spacing

In Swap Shaders added ability to swap to 'Add Shader' and to 'Mix Shader' and few minor changes in naming of variables

- New Subsurface Scattering Shader has been added, so Nodes Efficiency Tools 'Swap Shaders' needed to be updated to take SSS into account.
- Revision 55718 changed keyboard shortcuts for 'Find nodes' and 'Make Links with Replace'.
    (Ctrl-F for 'Find Nodes' and Shift-F for 'Make Links with Replace')
    Those changes caused shortcuts conflicts with Nodes Efficiency Tools 'Link Active To Selected'.
    New shortcuts for 'Link Active to Selected are as follows:
        BACK_SLASH - call 'Link Active to Selected' menu
        K - link to all selected, don't replace links.
        Shift-K - link to all selected, replace links.
        QUOTE - link to selected when node name matches, don't replace links.
        Shift - QUOTE - link to selected when node name matches, replace links.
        SEMI_COLON - link to selected when outputs names matche, don't replace links.
        Shift - SEMI_COLON - link to selected when outputs names match, replace links.

'K' key is used as it's the last letter of 'LINK'. QUOTE and SEMI_COLON are used as they are close to BACK_SLASH that call main 'Link Active to Selected' menu.
Any suggestions for using different keys are more than welcome.

Keymap Item for LinkUseNamesMenu changed from alt-F to Shift-Alt-F.
Recent changes introduced 'Find' option and keyboard shortcut for that is 'Alt-F', so there was a conflict.

'Nodes Efficiency Tools' is a set of several tools that can speed up working with nodes, both compositing and Cycles shaders.
They automate several tasks that by default require many clicks, drags etc.
All of the tools can be accessed via additional panel in node editor properties toolset or by hitting Ctrl-Space keyboard shortcut.
Most of the options however have their own keyboard shortcuts and using them is much more efficient.
You can find all of the info on the wikipage: http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Nodes/Nodes_Efficiency_Tools

Available options are as follows:

Merge selected nodes:
Imagine that you want to 'add' images represented by outputs of some nodes.
Standard way of doing it is to add MIX node, change blend type to 'Add' and link outputs of the nodes accordingly.
With Nodes Efficiency Tools you can select the nodes and hit (Ctrl +) keyboard shortcut.
Proper setup of nodes will be added and links will be made.
Other shortcuts are used for other blend types, you can also use 'Math' nodes for merging and different shortcuts allow to do so.

Batch Change Blend Type or Math Operation:
Hit (Alt-UP ARROW) or (Alt-Down ARROW) to change blend types or math operations of selected nodes.
It's often much quicker than standard way of doing it.
Use additional menu to select the blend type from the list and change types of all selected nodes at once.

Change Factor of Mix Nodes or Mix Shaders:
(Alt-LEFT ARROW), (Alt-RIGHT ARROW) shortcuts allow to change factors of selected Mix nodes or Mix Shader nodes by 0.1.
More precision is gained when we add Shift to the key combination.

Align Nodes:
We can align nodes nicer than by hitting S-X-zero. Even distribution of aligned nodes can be achieved easily. (Shift =)

Copy Settings:
We can copy settings from Active Node to all selected ones.
May be helpful if you want to use exactly the same RGB Curves nodes in different places of your node tree.
This option works with all node types.

Copy Label:
We can copy labels from one node to other nodes with one click.

Swap Nodes:
It's possible to change the node to other type.
Swap easily between 'Mix' and 'Alpha Over' nodes for example or easily change 'Diffuse' Shader to 'Glossy' Shader.

Link Active to Selected:
This option allows to link active node to all selected ones basing on several criteria.
May be extremely helpful when for example re-linking image sources.
We can easily change input Render Layers node to input image (MultiLayerEXR) preserving nodes setup.

All of the options are explained in details in the video tutorial embedded on the wikipage.

[[Split portion of a mixed commit.]]