New 0.9d fixes:

1) Changed the copyright notice to include Digitalk's copyright

2) Discovered an erratic programming technique that created
   unpredictable results using certain BASIC functions where
   parameters derived using rnd(), time$(), date$(), and any
   other function where the result is not always the same.
   Problem fixed.

3) When a floating point value was passed to a single
   dimensioned array as an index, a system primitive notice
   was produced, and the program was halted.  This problem
   is now fixed.

4) READ, DATA, and RESTORE are added to conform more to
   Microsoft's BASICs and to school texts.

5) Now if a non-integer is used to index a MID$() function, it
   is truncated and execution continues instead of crashing.