Font table and metric inspector

Reads a binary TrueType or OpenType font file and shows its tables: signature and flavour, table count, each table offset and length, the em size and magic number from head, the glyph count from maxp, ascender and descender from hhea, and the names from name. It collects warnings when a table lies outside the file, when head, maxp, hhea or name is missing, or when a value looks unnatural.