V1.2

V1.2: Many fixes to the script.

• Updated default bone mappings for easier reference.
• Added aim_matrix_02a + aim_matrix_02b to protected_bones to fix the warnings.
• Stripped out metacarpel bone weight and some messy bone weight steps to avoid stretchy parts.
• Fixed raise Exception — the two mesh validation checks now actually throw instead of silently doing nothing.
• Fixed Spine weight split — REPLACE on spine_0 first before ADD to spine_1, so you get 50/50 not 150/50.
• Fixed list(bones_b) on the removal loop so it doesn't corrupt while iterating.
• Fixed last_direction initialized as 0 (int), not a Vector
  And, some other fixes.

V1.1

V1.1: Meta bones and default bone fixes.

• Added meta fingers bones for models with meta bones. So, the script doesn't need to create a new ones for models with meta finger bones. Thanks to @Noztik (Original Author of the script) for suggestion!
• Made the default bone mapping simple instead of the ones I used for the model in the guide. oops

V1.0

V1.0: Release of the forked script.

Nothing special yet. Feel free to report if any issues occur while using this!