implemented parsing of SFNT wrapper and table records:
- added HardwareFontData.as, value object holding the wrapper data and tables contained in the font file
- added SFNTWrapper.as, containing font format version, number of tables, etc
- added Table.as, containing the table record. Will contain table data.
- added TableRecord.as, containing table tag (name), checksum, offset and length
- added IFontParser.as interface, implemented by OpenTypeParser.as
- added OpenTypeParser.as
- HardwareFont.as now contains the fontParser and data fields.