Add script to calculate project size.

This will help keep the "lightweight" claim up.

calcsize.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+#
+# Rougly calculates the size of the (non-whitespace, non-comment) code
+# This is a convenience script to make sure our "lightweight" statement on the
+# project home page will still hold ;)
+#
+# Copyright (c) 2011 Vincent Driessen, @nvie
+#
+
+find_source_files() {
+	find . -name '*.py' | egrep -v '(dummy|examples|setup|tests)'
+}
+
+dump_source_files() {
+	find_source_files | xargs cat
+}
+
+filter_out_comments_and_whitespace() {
+	grep -v '^\s*#' | grep -v '^\s*$' | grep -v '"""'
+}
+
+code_size() {
+	dump_source_files | filter_out_comments_and_whitespace | wc -c
+}
+
+code_locs() {
+	dump_source_files | filter_out_comments_and_whitespace | wc -l
+}
+
+echo "Size: $(code_size) kB"
+echo "Lines: $(code_locs) kB"