Fixed a couple of bugs regarding layout lookups.
- Fixed: The applyGlyphLookups function of Glyph.as didn't use the index stored in the lookupIndices vector but the original index instead.
- Fixed: All lookups of a feature were applied to one character, even if one of the lookups substitutes said character.
- Optimization: Switched the _lookupMap in Glyph from an Object to a Vector, the mapping of the table name to the correct index is done via switch case