Add helpful Makefile

Author: pdarragh

.gitignore

@@ -2,3 +2,4 @@
 *.run
 *~
 compiled/
+*.zip

Makefile

@@ -0,0 +1,14 @@
+%.zip: $(shell find . -name "$*/*.rkt" -o -name "$*/*.[ch]" -o -name "Makefile")
+	-$(RM) $@
+	zip -r $@ $* \
+		-x \*.[os] \
+		-x \*.DS_Store \
+		-x \*~ \
+		-x \*zip \
+		-x \*Zone.Identifier \
+		-x \*\*compiled\*\*
+
+.PHONY: clean
+
+clean:
+	-$(RM) *.zip

README.md

@@ -1 +1,9 @@
-# assignments
+# CMSC 430 Assignment Starter Code
+
+Each directory contains the starter code for a course assignment. As with the
+[course languages](https://github.com/cmsc430/langs), they increase in
+complexity in lexicographic order.
+
+A [Makefile](Makefile) is provided to build starter zips. Invoke with `make
+<assignment-dir>.zip`, e.g., `make dupe-plus.zip`. This will exclude any
+undesirable files (`.o` files, `compiled/` subdirectories, etc).