Blender Git Loki

Bone naming fix.

- On duplicating bones in editmode, names with a dot in it (bone.L) lost
the .L extension. Now it keeps it
- Recoded the 'flip name' routine from scratch, was a horrid construct!
It works now as follows;

1) First it removes the number extension, if its there (like .001)
2) Then it checks for a separator (space, dot, minus, underscore) on either
the 2nd position (L_calfbone) or last-but-one (calfbone.R). If there's an
l, r, L or R it switches the letter.
3) If no switch done yet, it tries if a name starts or ends with "left" or
"right", case insensitive. It replaces this, disregarding separator.

Examples:

Lefthand -> Righthand
L Hand.005 -> R Hand
hand.r -> hand.l
right-l -> right-r
pelvis LEFT -> pelvis RIGHT