Release 2.4.0

• Ported universal formatting facility from Common Lisp and made it available via library (lispkit format)
• Library (lispkit records) now supports extensible records compatible to SRFI 131
• New procedures in library (lispkit system): available-region?, region-flag, available-language?, available-currencies, available-currency?, currency-name, currency-code, currency-numeric-code, and currency-symbol
• New procedures in library (lispkit port): display-format, write-formatted
• New procedures in library (lispkit bitset): fixnum->bitset, bitset->fixnum
• New procedures in library (lispkit system): terminal-size, make-uuid-string, make-uuid-bytevector
• New procedure in library (lispkit draw): clear-drawing
• New procedures in library (lispkit draw turtle): arc, turtle-x, turtle-y, turtle-angle, turtle-pen-down?
• New procedure load-program in library (lispkit core) supports executing programs in an empty environment
• Procedure type-of of library (lispkit type) now returns a list of type tags (from most specific to least specific type)
• Renamed library (lispkit system os) to (lispkit system call)
• Renamed object in library (lispkit type) to obj to prevent conflicts with other libraries
• Extend library (lispkit bytevector) with procedures bytevector=?, bytevector->hex, and hex->bytevector
• Reimplementation of procedure open-file in library (lispkit system) supporting custom application paths
• Enforce that imported (immutable) definitions cannot be mutated, unless it's in the REPL; export-mutable in library definitions enable mutability
• Allow configuration of REPL output via format config repl-format-config of library (lispkit format)
• Improved display of OS-level exceptions and errors in REPL
• New libraries: (lispkit format), (lispkit crypto), (lispkit archive tar), (lispkit list set), (srfi 239), (srfi 235).
• New sample code: Blockchain.scm