git mv *.hint -> README.md

There is one exception:

    $ find . -name '*.hint' -execdir git mv '{}' README.md \;
    git statufatal: destination exists, source=1992/albert/albert.hint, destination=1992/albert/README.md

Looking at the two files they differ quite a bit so I've not changed it.
I'll bring this up on GitHub.

1991/buzzard/README.md

@@ -0,0 +1,92 @@
+Best Output:
+
+	Sean Barrett
+	University of Maryland
+	5407 20th Place 
+	Hyattsville MD 20782 
+	USA
+
+
+Judges' comments:
+
+    Make and run as follows:
+
+	make buzzard
+	buzzard
+
+    You will be A-mazed.
+
+    You are invited to try to cheat, ... if you can figure out how!  :-)
+
+
+Selected notes from the author:
+
+    HOW TO PLAY:
+
+    When the game starts, you are at the far end of the maze from the
+    exit, looking down a corridor.  To move forward, type 'f' and press
+    return.  To turn 90 degrees right, type 'r'; left, 'l'.  You can
+    put multiple commands on one line, and the new view will be drawn
+    after all the moves.
+
+    The game ends if you get out the exit (you'll know it when you see
+    it) or when you type ^D.
+
+    HINTS ON HOW TO CHEAT:  (rot13 to read)
+
+    Lbh pna, bs pbhefr, purng ol ybbxvat ng gur znmr znc.  Gur dhrfgvba
+    lbh arrq gb nfx lbhefrys, gubhtu, vf jung frdhrapr bs punenpgref
+    znexf gur cynpr jurer lbh pna rfpncr gur znmr?
+
+    Gur nytbevguz vf dhvgr ovmneer--gur cevznel arfgrq ybbc gung
+    trarengrf vg tbrf gbc gb obggbz ba gur qvfcynl, ybbcvat sbejneq
+    gura onpxjneq sebz gur pheerag cbfvgvba gb qenj gur yrsg fvqr naq
+    gura gur evtug fvqr.
+
+    ADVANCED USAGE NOTES:  (rot13 to read)
+
+    Gur cebtenz pna nyfb or eha sebz bgure svyrf pbagnvavat znmrf.  Gur
+    znmr fubhyq or ynvq bhg tencuvpnyyl va gur boivbhf sbezng; arjyvarf
+    frcnengr culfvpny ebjf va gur znmr; n fcnpr vaqvpngrf n pbeevqbe,
+    naq nal bgure punenpgre vf n jnyy.  Gnof ner nyfb pbafvqrerq jnyyf,
+    fb znxr fher gb pbaireg gnof gb fcnprf orsber hfvat vg.
+
+    Hfntr: ohmmneq [svyranzr [rfpncr-pune [fgneg-k fgneg-l]]]
+
+    Svyranzr vf gur anzr bs gur svyr pbagnvavat gur znmr.  Guvf
+    qrsnhygf gb 'ohmmneq.p'.
+
+    Rfpncr-pune vf gur punenpgre va gur znmr gung ercerfragf gur rkvg.
+    Lbh pna chg zber guna bar rkvg va gur znmr (sbe rknzcyr, lbh pbhyq
+    znxr nyy '!'f va gur znmr or rkvgf).
+
+    Fgneg-k naq fgneg-l znex gur pbbeqvangrf jurer lbh ortva cynlvat.
+    L pbbeqvangr vf qbja gur ebjf va gur svyrf, K vf gb gur evtug
+    guebhtu gur punenpgref bs rnpu yvar.  Obgu K naq L ortva pbhagvat
+    sebz 0.  Gur qrsnhyg vf fgneg-k = 4, fgneg-l = 5, juvpu vf arrqrq
+    sbe gur ohmmneq.p, ohg jbhyq cebonoyl or vanccebcevngr sbe bgure
+    znmrf.
+
+    OHTF:
+
+    Lbh pna'g punatr gung ng fgneg lbh'er snpvat qbja ("fbhgu").
+	    
+    Gur qenjvat nytbevguz pnaabg unaqyr bcra fcnprf (gjb fhpprfvir
+    fvqr-pbeevqbef jvgu ab jnyy orgjrra gurz).  Va snpg, vg pnaabg unaqyr
+    fznyy qbt-yrtf cebcreyl, nygubhtu gur reebe vf fhogyr.
+
+    Gur rkvg vf qenja yvxr n abezny pbeevqbe sebz gur fvqr ivrj;
+    vg'f bayl qvfcynlrq nf gur rkvg jura lbh ner snpvat vg.
+
+    Vzcebcre pbzznaqyvar nethzragf ner abg unaqyrq avpryl.
+
+    Znmrf jvgu bcravatf ng gur rqtrf jvyy pnhfr gur qenjvat cebtenz
+    gb ernpu vagb neovgenel cnepryf bs zrzbel.
+
+    Gur cebtenz nffhzrf gung gnof ner frg gb 8 punenpgref.
+
+Copyright (c) 1991, Landon Curt Noll & Larry Bassel.
+All Rights Reserved.  Permission for personal, educational or non-profit use is
+granted provided this this copyright and notice are included in its entirety
+and remains unaltered.  All other uses must receive prior permission in writing
+from both Landon Curt Noll and Larry Bassel.