Parse 'toBonds' to bold wedge generation.
Including intersection calculation in VecmathUtil.
Fancy bold wedge rendering aligns the wedge flush with adjacent bonds.
Ensure slanted wedges are flush with the adjacent bond.
Special case when offset bonds are preferred is when the double bond is at the wide end of an edge.
Slanted hashed wedge bonds also.
Allow the fancy rendering of wedges to be turned disabled.