Changelog for xstacks-pfe.fs and xstacks-pfe-test.fs.

Unattributed changes are by David N. Williams.  Last revision
dates in source files may reflect cosmetic changes not recorded
here.  Unless otherwise stated, tests or benchmarks mentioned
here have been run under MacOS X.

Version 0.6.5
	* Added "[" and "]" to names of xstack primitives to
	  agree with changes in xstacks-ext.c, and tested with
	  xstacks-pfe-test.fs.

Version 0.6.4
17Sep04 * Changed name of file to xstacks-pfe.fs.  Rebuilt pfe
          execution and xstacks modules with pfe-0.33.34 and
          verified that test-xstacks still works.
        * Assigned original file name, xstacks.fs, to future ANS
          Forth version.
 3Oct04 * Removed "requires plainstruct.fs", removed STRUCT, and
          defined FIELD: explicitly.
 7Oct04 * Added CREATE-XSTACK.
 2Aug06 * Wrapped FIELD: with [UNDEFINED].
 9Sep06 * Renamed test-xstacks.fs as xstacks-pfe-test.fs, and
	  updated it to load xstacks-pfe.fs.
 
Version 0.6.3
21Sep02 * Added DROP after xstack structure to remove lingering
          offset due to no /STRUCT: definition.

Version 0.6.2
16Sep02 * Replaced qdstruct.fs with plainstruct.fs
        * Changed colon prefix for defining words to colon
          suffix.
17Sep02 * Removed indirect break field from xstack structure
          and updated xstacks-ext.c.
        * Made xstacks-ext.c into a 0.32.xx pfe module.
        * Updated test-xstacks.fs and ran all tests
          successfully.

Version 0.6.1
22Feb01 * Start pfe port.
26Feb01 * Last change.

M680x0 ^Forth Version (stack.fs)
 2Dec95 * Start.
22Sep96 * Last change.