Added io.Reader/Writers to satisfy io.Copy() interface

Added cmd/main for CLI usage

Signed-off-by: Russ Magee <rmagee@gmail.com>

cmd/main.go

@@ -0,0 +1,33 @@
+// WANDERER - a crypto doodle that appears to give adequate
+// protection to data in a stream cipher context (?)
+//
+// Properties visualized using https://github.com/circulosmeos/circle
+//
+// test command-line 'main' program
+package main
+
+// TODOs:
+// -use a crypto rand (eg mtwist64) instead of go pkg rand?
+// -define s-box rotation/shuffle schema
+// -devise p-box schema
+// ...
+
+import (
+	"flag"
+	"io"
+	"os"
+
+	"blitter.com/go/cryptmt"
+)
+
+var (
+	k string
+)
+
+func main() {
+	flag.StringVar(&k, "k", "WARNING_DEFAULT_KEY", "Key (NOTE insecure specified on command line)")
+	flag.Parse()
+
+	c := cryptmt.New(os.Stdin, os.Stdout, []byte(k))
+	_, _ = io.Copy(c, c)
+}