cad/openvsp: update to 3.16.2

Announcement: http://openvsp.org/blogs/announcements/2018/10/29/openvsp-3-16-2-released

Features:

• DegenGeom additions
• API Animation support
• Four digit modified airfoils
• Five digit & modified airfoils
• 16 series airfoils
• Fuselage and stack end caps
• BOR support in API
• General API cleanups

Bug Fixes:

• Many small fixes
• Fuse file xsec symmetry problem
• Fix point clustering on airfoil export