Factor/To do/Specialized arrays

• look at <c-array> usage

Done

• integrate docs into handbook
• FFI calls should call underlying>> on specialized arrays and direct arrays
• rewrite interpolate to not use pegs perhaps
• revive float array specialization
• Specialized arrays of structs and unions
• Update basis and extra
• Functors should record definitions in current source file
• Document io.mmap mapped arrays
• Maybe mapped-file doesn't need to support sequence protocol
• Document specialized-arrays.direct
• stack effects for generated words
• byte array > specialized array words
• Phase out float-array
• Phase out words like >c-float-array, c-float-array> etc
• Maybe split them up into separate vocabs?