Updated version string for 2012.6.
Added support for group_by query filter in subTreeCountByNodeID.
Added core extensions from master branch.
Updated extension refs.
Updated submodule refs.
Removed core extensions as submodules.
Added core extensions.
Removed core submodules.
Re-added core extensions.
Fixed version error.
Upgraded jquery and removed deprecated versions.
Upgraded jquery UI.
Removed old UI script.
Added new script version.
Fixed #015918: Moving a node doesn't update search index
Fixed more actions not showing up after selecting children.
Added belgian locale.
Changed some validation strings.
Minor translation updates.
Fixed leftover merge string.