Fix T42411: Camera inside volume + particle dupli (object/group) doesn't work

The issue was caused by missing current object instance initialization after
object was ignored for instance push.
Cycles: Don't check shader for volume when checking if camera is inside volume

Intersection code already ignores objects without volume closure so checking it
afterwards is not needed.
Code cleanup: Replace magic number with verbose name for math node operations

Should be no functional changes, just much less cryptic code.
Simplify node frame detach operators, based on T34670 by @julien.

* The `NODE_OT_parent_clear` operator has been removed. This was a very
simplistic operator that detached every selected node, which is not very
useful in case of hierarchical frames. The `NODE_OT_detach` operator
only detaches the top parent nodes in the selection, keeping the
hierarchy of selected nodes intact.

* The `ALT+P` shortcut has been reassigned to the `NODE_OT_detach`
operator which replaces the previous `NODE_OT_clear` mapping with
similar behavior (also gives a menu entry shortcut now).

* Shortcuts for `NODE_OT_detach_translate_attach` have been removed, due
to crowded and messy keymap and unintuitive shortcut `ALT+F`. This macro
operator is still registered, in case hardcore users want to make their
own keymaps, but not mapped by default. Node keymaps may need some
redesign in the future for these things.
Debug: print output on --debug-fpe

in practice often we want to breakpoint here (instead of flooding output)
but its confusing the option does nothing in release builds.

Devs can comment out locally.
Editmesh: report a warning when fill fails

also prevent assert with zero normal
Fix T42255: "Copy Constraints" operator has to tag the affected object
and pose for depsgraph.

Otherwise the update order can be incorrect until the next sort is
executed.
Fixed warning about redefining the __SSE__ macro in VS2013
Cycles: Add "Max Bounce" control for lamps

With this setting, we can limit the influence of a lamp to a certain amount of bounces.
0 = Only direct light contribution
1 = 1 light bounce
...

Differential revision: https://developer.blender.org/D860

You can find an example render in the release logs: http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.73/Cycles
Correct recent refactor (use generic callback)
Gooseberry request, append the file name to autosaves as well as the pid
Slight corrections to the string formatting of autosave, thanks to
Campbell for the help!
Revert "Metastrips: disallow making a metastrip with only one strip present."

This reverts commit a1578f08dc442b0c64f05a1ab18ef0fd90a9f6e4.

Looks like some workflows benefit from being able to do this
Fix T42492, Shading error with fresnel weight node.

Orthographic case needs different handling.
Editmesh: select more/less can now step over adjacent faces

This keeps a square shaped selection when using grid topology.
Fix T42525 crash when deleting lamp attached to Lamp Data material node
in material shading mode.
Fix T42497: Enlarge rename text field in File Browser

To ensure there's space for more than a few characters in the rename text fields of the File Browser, we now use a width relative to the column width (for all display modes).

Includes some edits from @campbellbarton - thanks for this!
better fix for fix T42525 (tm)

Looks like material node trees are stored directly in the material. The
reason I thought this was fixed was because my test file didn't connect
the lamp data node in the rest of the tree.

Thanks to Campbell for catching this :)
Fix T42208 color pickers are coupled.

Decouple color picker hsv data from the whole block. Basically, each
color picker now takes care of creating its own color picker role. For
this bug report it can be seen that probably HSV is not the best space
for gamma/lift/gain workflow because it is bounded at 1.0 but this is a
separate issue.
Merge remote-tracking branch 'hm-blender/master'

* hm-blender/master:
  Fix T42208 color pickers are coupled.
  better fix for fix T42525 (tm)
  Fix T42497: Enlarge rename text field in File Browser
  Fix T42525 crash when deleting lamp attached to Lamp Data material node in material shading mode.
  Editmesh: select more/less can now step over adjacent faces
  Fix T42492, Shading error with fresnel weight node.
  Revert "Metastrips: disallow making a metastrip with only one strip present."
  Slight corrections to the string formatting of autosave, thanks to Campbell for the help!
  Gooseberry request, append the file name to autosaves as well as the pid
  Correct recent refactor (use generic callback)
  Cycles: Add "Max Bounce" control for lamps
  Fixed warning about redefining the __SSE__ macro in VS2013
  Fix T42255: "Copy Constraints" operator has to tag the affected object and pose for depsgraph.
  Editmesh: report a warning when fill fails
  Debug: print output on --debug-fpe
  Simplify node frame detach operators, based on T34670 by @julien.
  Code cleanup: Replace magic number with verbose name for math node operations
  Cycles: Don't check shader for volume when checking if camera is inside volume
  Fix T42411: Camera inside volume + particle dupli (object/group) doesn't work