- Added a BITSET statement to set a specified bit from a variable.

   Syntax:
    BITSET variable,bit

   This statement is primarily intended to be used with BIGSTR variables
   which can be up to 2048 bytes long.  However, it will work with other
   data types as well if desired.  Just be aware of the potential
   problems in 'bit twidling' non-string buffers and then trying to
   access them later as their 'intended' type without re-initializing the
   variable.  If the bit parameter (an integer from 0 to the number of
   bits in the object) is invalid no processing takes place.