Add the beginnings of a regression-test suite.

diff --git a/test/Makefile b/test/Makefile
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+++ b/test/Makefile
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+# Test-suite makefile for sst
+
+all: regress
+       @echo "No diff output is good news."
+
+.SUFFIXES: .log .chk
+
+.log.chk:
+       ../sst.py -r $< >$@ 2>&1
+
+TESTLOADS := $(shell ls *.log | sed '/.log/s///')
+buildregress:
+       @for test in $(TESTLOADS); do \
+           if [ ! -f $${test}.tst ] ; \
+           then \
+                   echo "Remaking $${test}.chk"; \
+                   rm -f $${test}.chk && ../sst.py -r $${test}.log >$${test}.chk 2>&1; \
+           fi \
+       done
+regress:
+       @for test in $(TESTLOADS); \
+       do \
+           if [ ! -f $${test}.tst ] ; \
+           then \
+               (if echo "Testing $${test}" >&2; \
+               ../sst.py -r $${test}.log >/tmp/regress 2>&1; \
+               then diff -u $${test}.chk /tmp/regress; \
+               else echo "*** Nonzero return status on $${test}!"; exit 1; fi;) \
+           fi \
+       done
+       @rm -f /tmp/regress

diff --git a/test/README b/test/README
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+++ b/test/README
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+This directory contains regression test pairs for SST.
+
+A regression test log is just a command capture from a game with a QUIT
+appended to tell it to exit.  The corresponding check file is just the
+output stimulated by the log.  All files with extension ".log" in this
+directory will be treated as test logs, with each corresponding checkfile
+having extension ".chk".
+
+"make regress" checks that the output of the logfiles is stable. It
+will show context diffs when the actual output is different from the
+checkfile.
+
+"make buildregress" rebuilds all check files from their logs.

diff --git a/test/test1.chk b/test/test1.chk
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index 0000000..26e045c
--- /dev/null
+++ b/test/test1.chk
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+sst2k: seed set to 1329758601
+
+
+-SUPER- STAR TREK
+
+Would you like a regular, tournament, or saved game? # recorded by esr@snark on Mon Feb 20 12:23:21 2012
+r
+Would you like a Short, Medium, or Long game? s
+Are you a Novice, Fair, Good, Expert, or Emeritus player? n
+Choose your game style (plain, almy, fancy or just press enter): 
+
+
+It is stardate 3054. The Federation is being attacked by
+a deadly Klingon invasion force. As captain of the United
+Starship U.S.S. Enterprise, it is your mission to seek out
+and destroy this invasion force of 3 battle cruisers.
+You have an initial allotment of 7 stardates to complete
+your mission.  As you proceed you may be given more time.
+
+You will have 5 supporting starbases.
+Starbase locations-  1 - 7  3 - 8  3 - 1  5 - 8  2 - 2  
+
+The Enterprise is currently in Quadrant 6 - 7 Sector 8 - 8
+
+Good Luck!
+COMMAND> 
+COMMAND> m 8
+(Manual movement assumed.)
+
+Beg your pardon, Captain?
+COMMAND> move 8 7 3 2
+(Manual movement assumed.)
+
+Helmsman Sulu- "Aye, Sir."
+
+YOU HAVE ATTEMPTED TO CROSS THE NEGATIVE ENERGY BARRIER
+AT THE EDGE OF THE GALAXY.  THE THIRD TIME YOU TRY THIS,
+YOU WILL BE DESTROYED.
+
+[ANNOUNCEMENT ARRIVING...]
+
+***Enterprise caught in long range tractor beam--
+Enterprise is pulled to Quadrant 4 - 4, Sector 9 - 8
+Shields raised.
+
+32 unit hit on the Enterprise from Klingon at Sector 4 - 10
+
+21 unit hit on the Enterprise from Klingon at Sector 1 - 5
+
+
+Energy left 4090    shields up 71%,   torpedoes left 10
+COMMAND> torp
+10 torpedoes left.
+Number of torpedoes to fire- 3
+Target sector for torpedo number 1- 1 5
+Target sector for torpedo number 2- 4 10
+Target sector for torpedo number 3- 7 9
+
+Track for torpedo number 1-  8 - 8   7 - 7   6 - 7   
+5 - 6   4 - 6   3 - 6   2 - 5   1 - 5   
+***Klingon at Sector 1 - 5 destroyed.
+
+Track for torpedo number 2-  8 - 8   7 - 9   
+***Commander at Sector 7 - 9 damaged-- displaced by blast to Sector 8 - 9 
+
+Track for torpedo number 3-  8 - 9   
+***Commander at Sector 8 - 9 destroyed.
+
+34 unit hit on the Enterprise from Klingon at Sector 4 - 10
+
+
+Energy left 4056    shields up 68%,   torpedoes left 7
+COMMAND> QUIT
+
+May the Great Bird of the Galaxy roost upon your home planet.

diff --git a/test/test1.log b/test/test1.log
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index 0000000..7d65349
--- /dev/null
+++ b/test/test1.log
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+# seed 1329758601
+# options 
+# recorded by esr@snark on Mon Feb 20 12:23:21 2012
+r
+s
+n
+
+
+m 8
+move 8 7 3 2
+torp
+3
+1 5
+4 10
+7 9
+QUIT