Adding a lazy transformer example.

pkg/barback/example/lazy_transformer/lib/message.txt

Index: pkg/barback/example/lazy_transformer/lib/message.txt
diff --git a/pkg/barback/example/lazy_transformer/lib/message.txt b/pkg/barback/example/lazy_transformer/lib/message.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7f95e57300d2c78dd26e275f801aefbe55c4e0db
--- /dev/null
+++ b/pkg/barback/example/lazy_transformer/lib/message.txt
@@ -0,0 +1,21 @@
+Dear Mom,
+
+Hi! How are you? Sorry that I haven't written recently,
+but I hope all is well!
+
+Life is great at University. I'm sure that I can bring
+up my D- in French.
+
+Also, the Dean's office says they won't press charges.
+It was a big todo about nothing - just your typical college
+prank and the badger (UFE's mascot) was eating pretty
+well on my lunch card. And some spackle will fix the
+damage to my dorm room walls right up...
+
+By the way, can I have a loan? $300 would be great.
+
+Thanks so much and I love you!
+
+Your loving son,
+
+     Rodger