Blender Git Loki

Patch #8613 - Vertex groups in the mirror modifier.
This patch re-assigns the mirrored data to use vertex groups with "mirrored"
names (e.g. L_arm -> R_arm, Leg.R -> Leg.L etc.). Vertex groups with the
"mirrored" names must already exist in the base mesh.

This means that it is no longer necessary to apply the mirror modifier in order
to rig the mirrored data independently.

Thanks to Michael Fox for the patch!