Add preview of 1984-2019

The 2020 winners are hinted it, but the source code is not there,
nor are the hints. Someone could look into the HTML and
see what was commented out, but that is not a problem because
WHO won is known and the name of their AWARD is known already.
Moreover a number of the winners have talked about what their
entirs do, so the commented out spoiler text is not a bit problem.

One will find HTML commented out with:

    <!-- XXX remove when 2020 is ready
    2020 links here
    XXX remove when 2020 is ready -->

The "XXX remove when 2020 is ready" string is found at the
start and end comment blocks.  Again, soneone could read
what was commented out, but that is OK since most of that
information is known or can be known.  The following files
have such HTML comment blocks in them.

    ./winners.html
    ./years-spoiler.html
    ./years.html

In addition, ./all/summary.txt was modified to not
include the 2020 entries for the momemt.

The 2020 winner code AND write-ups are NOT part of this set.

p.s. The all/all.tar.bz2 does not contain the 2020 source code (yet?).

1986/hague/hague.c

@@ -0,0 +1,28 @@
+#define	DIT	(
+#define	DAH	)
+#define	__DAH	++
+#define DITDAH	*
+#define	DAHDIT	for
+#define	DIT_DAH	malloc
+#define DAH_DIT	gets
+#define	_DAHDIT	char
+_DAHDIT _DAH_[]="ETIANMSURWDKGOHVFaLaPJBXCYZQb54a3d2f16g7c8a90l?e'b.s;i,d:"
+;main			DIT			DAH{_DAHDIT
+DITDAH			_DIT,DITDAH		DAH_,DITDAH DIT_,
+DITDAH			_DIT_,DITDAH		DIT_DAH DIT
+DAH,DITDAH		DAH_DIT DIT		DAH;DAHDIT
+DIT _DIT=DIT_DAH	DIT 81			DAH,DIT_=_DIT
+__DAH;_DIT==DAH_DIT	DIT _DIT		DAH;__DIT
+DIT'\n'DAH DAH		DAHDIT DIT		DAH_=_DIT;DITDAH
+DAH_;__DIT		DIT			DITDAH
+_DIT_?_DAH DIT		DITDAH			DIT_ DAH:'?'DAH,__DIT
+DIT' 'DAH,DAH_ __DAH	DAH DAHDIT		DIT
+DITDAH			DIT_=2,_DIT_=_DAH_;	DITDAH _DIT_&&DIT
+DITDAH _DIT_!=DIT	DITDAH DAH_>='a'?	DITDAH
+DAH_&223:DITDAH		DAH_ DAH DAH;		DIT
+DITDAH			DIT_ DAH __DAH,_DIT_	__DAH DAH
+DITDAH DIT_+=		DIT DITDAH _DIT_>='a'?	DITDAH _DIT_-'a':0
+DAH;}_DAH DIT DIT_	DAH{			__DIT DIT
+DIT_>3?_DAH		DIT			 DIT_>>1 DAH:'\0'DAH;return
+DIT_&1?'-':'.';}__DIT DIT			DIT_ DAH _DAHDIT
+DIT_;{DIT void DAH write DIT			1,&DIT_,1 DAH;}