Implemented more internal parsers in the FontParserVersion3 class to
read the page table block, glyph table block and the kerning pair table
block from a binary format font buffer stream. Also changed the
implementation of the ReadNullTerminatedAsciiString method in the
ByteStream class so that the length returned also includes the byte used
for the null terminator. Some unit tests for the ByteStream class were
were modified.