Refactoring: Split GlyphPositioningTableParser.as functionality into separate functions.
- GlyphPositioningTableData.as now extends ScriptFeatureLookupTable.as, which will later be extended by the glyph substitution table as well.
- GlyphPositioningTableParser.as now extends ScriptFeatureLookupTableParser.as, which will later be extended by the glyph substitution table parser as well.
- added NotYetImplementedSubtableParser.as
- added AnchorTableParser.as
- added CursiveAttachmentPositioningSubtableParser.as
- added MarkArrayTableParser.as
- added MarkToBaseAttachmentPositioningSubtableParser.as
- added MarkToLigatureAttachmentPositioningSubtableParser.as
- added MarkToMarkAttachmentPositioningSubtableParser.as
- added PairAdjustmentPositioningSubtableParser.as
- added SingleAdjustmentPositioningSubtableParser.as
- added ValueFormatParser.as
- added ValueRecordParser.as