temp22
Clean up dead code.
Re-create icon.ico.

Include all icon sizes, 256, 48, 32, 16.
Enable SSE2 optimizations.

LAV Filters requires SSE2, see https://github.com/Nevcairiel/LAVFilters/commit/c0bf54f6863db9fd6c522179d049a8a5a6811884
Remove installer messages and checks for SSE.
Update ZenLib to v0.4.29 r481.