Main change is of course writing hypertex.c!
Fixes:
1. Changed to page-based indexing of anchors - fixed several problems.
2. Fixed cursor warping problem.
3. Fixed problem with use of currwin rather than mane for
dvi offsets - after pointer clicked, offset was totally wrong.

June 2, 1994:
4. Fixed some problems with error handling when a reference 
   is not found
5. Allow command-line anchor references: ht_test#def1 is a valid
   startup file name.
June 3, 1994:
6. Switched from rectangular box to underline to indicate href, as
  per Ginsparg suggestion.

June 5-30 1994:
7. Colored hrefs in addition to underlining
8. Toolkit support: New widget to show the anchor under mouse, etc.
9. Allow keyboard entry of hrefs - in "Go to:" window
10. Usurp left button action if over href, + usurp "b", "f" action (lowercase)
11. Creation of application-defaults file.
12. Lots of bug fixes :-)
13. Added a button for non-experts - pushing "back" button does same as
		typing "b"

July 1 1994:
14. Fixed hrefs on names with '=' in them.
15. Added external URL calls through WWWBROWSER environment variable.

July 26 1994:
16. Added wwwBrowser to Xdefaults and app-resources file, and -browser
    command line option.

July 29-30 1994:
17. Merged with xdvi-18 (for inline postscript support among other things)
18. Added -base command line argument and urlBase in resources files,
	to specify a base URL for subsequent external links.
19. Added mime/mailcap-based support for interpreting file name extensions
	of local files and bringing up the appropriate viewer.
20. Various minor bug fixes..., and added -/+underlink option (underLink
	in defaults files) to adjust hypertext underlining.
21. Added support for Dave Oliver's HyperTeX format at rudimentary level.
22. Added html:<base URLname> and html:<img src=file.ext> options -
	the first resets the base URL name, the second brings up
	a viewer for file.ext.

September 1-16 1994:
23. No longer move cursor around on page when following links or
	backtracking.
24. External files are searched for starting from the same directory the dvi
	file itself was obtained from.
25. A couple of minor fixes: command buttons size according to text,
	reordering of the search sequence for dvi files (junk.dvi
	takes precedence over junk if command line is xhdvi junk).
26. A small window is brought up on middle-button click.
