Add "commit" helper script

This is meant to make raw git not hugely less usable than something
like raw CVS. I want to make a 1.0 release of the plumbing, and the
actual commit part was just too intimidating.

stripspace.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+/*
+ * Remove empty lines from the beginning and end.
+ *
+ * Turn multiple consecutive empty lines into just one
+ * empty line.
+ */
+static void cleanup(char *line)
+{
+	int len = strlen(line);
+
+	if (len > 1 && line[len-1] == '\n') {
+		do {
+			unsigned char c = line[len-2];
+			if (!isspace(c))
+				break;
+			line[len-2] = '\n';
+			len--;
+			line[len] = 0;
+		} while (len > 1);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int empties = -1;
+	char line[1024];
+
+	while (fgets(line, sizeof(line), stdin)) {
+		cleanup(line);
+
+		/* Not just an empty line? */
+		if (line[0] != '\n') {
+			if (empties > 0)
+				putchar('\n');
+			empties = 0;
+			fputs(line, stdout);
+			continue;
+		}
+		if (empties < 0)
+			continue;
+		empties++;
+	}
+	return 0;
+}