Version 8.0.0

• Sanitizing variation tables is always enabled now.
• Support CFF2 table, including variations support.
• Add some error messages to the CFF table parsing.
• Disallow multiple fonts in CFF table, per spec.
• Check for invalid glyph indices in CFF/CFF2 FDSelect.
• ignore VarRegionList.RegionAxisCount when RegionCount == 0 invariation tables.
• Remove version dependent reserved value checks from Graphite Silf table.
• Fix some compiler and Coverity warnings.
• Fix incorrect comparison in test code.
• Various code and build scripts cleanups.