Version 0.6.0 - 4-Feb-2024:
 - Added BIN2STR$() and STR2BIN() functions.
 - Added MM.INFO(LINE) function to return the number of the current line.
 - Added NOP implementation of PAGE command.
 - Changed file path reported in an error message to be canonicalised.
 - Changed maximum error message length to 255 characters (from 127).
 - Changed previously NOP implementation of MODE to clear the console.
 - Changed parser to allow any non-name character to be used as a keyword
   terminator, i.e. DIM i AS INTEGER=10 is now valid.
 - Changed 'micro' version in semantic versioning from 2 digits to 3, the most
   significant digit indicates whether it is an alpha, beta, RC or release
   version:
     0      - alpha
     1      - beta
     2      - RC (release candidate)
     3 .. 9 - release, in which case the "real" MICRO version is the
              3-digit number minus 300.
   e.g. version 1230560001 => 1.23 alpha 56 build 1
                1231560012 => 1.23 beta 56 build 12
                1232560123 => 1.23 RC 56 build 123
                1233561234 => 1.23.56 build 1234
                1234567890 => 1.23.156 build 7890
   Currently the version is 63000000 => 0.6.0 build 0.
 - Changed MM.VER to return an INTEGER instead of a FLOAT, the same as
   MM.INFO(VERSION).
 - Changed maximum length of command line when starting MMB4L from 256 to 512
   characters.
     - Also improved error message when that command line is too long.
     - Note that the length of a command entered at the MMB4L prompt is still
       limited to the width of the console.
 - Fixed bugs in DIR$() function that would cause a crash if called with no
   arguments:
       - If it had never been initialised with a pattern to match.
       - If the empty string indicating the end of the directory stream had
         already been returned.
 - Fixed bug in CALL command and function to allow the function/subroutine
   name to be provided by a non-trivial expression.
 - Fixed bug in variable declaration where 2nd and subsequent dimensions
   of a multi-dimensional array could be declared with 1 element.
 - Fixed bug with left and right arrow glyphs being swapped when using
   OPTION CODEPAGE CMM2.