added general README and turn-in script

README.txt

+The assignment instructions and starter code (if needed) are posted here.
+
+Please place your solutions in the submission directory then run:
+
+$ ./turnInHw.sh hw1
+

turnInHw.sh

+#!/bin/bash
+test -z "$1" && echo "Usage example: $0 hw1" && exit 1
+
+#check no uncommitted changes.
+(git status | grep -q modified:) &&  echo  'Error. There are uncommitted changes in your working directory. You can do "git status" to see them.
+Please commit or stash uncommitted changes before submitting' && exit 1
+COMMIT=$(git log | head -n 1 |  cut -b 1-14)
+if (git tag $1 2>/dev/null)
+then
+    echo "Created tag '$1' pointing to $COMMIT"
+else
+    git tag -d $1 && git tag $1
+    echo "Re-creating tag '$1'... (now $COMMIT)"
+fi
+echo "Now syncing with origin..."
+git push origin --mirror #--atomic
+echo "Please verify in gitlab that your tag '$1' matches what you expect. "