Blender Git Loki

Select by Keying Set...
* Split off code to refresh relative/builtin KeyingSets for the
current context before they get used to a separate function.
* Hooked this up to a new PyAPI/RNA function: KeyingSet.refresh().
Call this before checking the paths that a Keying Set has, especially
if it is not "absolute"

* Added option for "Select Grouped" operator (for Objects), which will
select all objects affected by the active Keying Set. This is probably
more useful for absolute KeyingSets, where changing the selection is
less likely to affect the result.
- The equivalent for bones is currently still in development, but is
likely to be more useful for animators, where rigs are the primary
animation entities they deal with