Split fat macho into own decoder macho_fat. This also fixes issue with section
offset etc not being correct as they are from the start of each embedded file.
Make all address and offset field be in hex.
Decode __cstring, __ustring and __cfstring sections.
Fix LC_ENCRYPTION_INFO_64 missing pading issue.
Skip ranging for __bss and __common as they dont have any data in the file.
Simplifed magic handling a bit and add symbols.
Simplified state struct field, had redudant struct.
Remove bitio.Buffer layer. bitio.Buffer was a kitchen sink layer with helpers
now it's just a buffer and most functions have been moved to decode instead.
bitio package now only have primitive types and functions simialar to standard
library io and bytes packages.
Make nearly eveything internally use bitio.Bit* interfaces so that slicing work
correctly this will also make it possible to start experimenting with more
complicated silcing helpers, ex things like:
breplace(.header.bitrate; 123) to get a new buffer with bitrate changed.
Was already handled in fq in various places as gojq uses them
Update msgpack to support negative integers that can't represented as int64
Rename read try* number functions to make them more explicit
Move scalar into own package.
Split scalar code into decode related scalar code (that reads etc) and
scalar code that just transform the scalar value.
Use a scalar.Mapper interface instead of just a function.
Make mappers, assert and validat impement the interface.
