Rotor update

[fzahle]

This PR addresses the following in the WindIO definition of the rotor:

• Updated pitch_axis offset to address instability seen in OpenFAST of previous design,
• Spar cap position adjusted to achieve the same torsional response as the original design,
• Adjusted LE and TE reinforcements,
• Prebend shape made smoother with a x**4 curve,
• Fix wrong airfoil shapes for FFA-W3-211 and FFA-W3-360,
• Adjust SNL-FFA-W3-480FB to make TE thickness increase more smooth in the root part,
• Recomputed all polars for 21%-48% airfoils,
• Fitted Bezier splines to all planform curves to ensure smooth curvatures, which results in a few minor differences,
• Remove increase in relative thickness at around 85%, which reduces stiffnesses slightly,
• Increase resolution to 102 nodes for aero and structure,
• Various minor adjustments to structural layups.

HAWC2:

• HAWC2 definition now has 40 sections in c2_def, and 102 sections in ae and blade_st files.