bring examples so tests pass.

examples/bad-stamp.txt

@@ -0,0 +1,2 @@
+The timestamp on this file is well-formatted, but will fail Bitcoin block
+header validation.

examples/hello-world.txt

@@ -0,0 +1 @@
+Hello World!

examples/incomplete.txt

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+The timestamp on this file is incomplete, and can be upgraded.

examples/known-and-unknown-notary.txt

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+This file's timestamp has two attestations, one from a known notary, and one
+from an unknown notary.

examples/merkle1.txt

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+This file is one of three different files that have been timestamped together
+with a single merkle tree. (1/3)

examples/merkle2.txt

@@ -0,0 +1,2 @@
+This file is one of three different files that have been timestamped together
+with a single merkle tree. (2/3)

examples/merkle3.txt

@@ -0,0 +1,2 @@
+This file is one of three different files that have been timestamped together
+with a single merkle tree. (3/3)

examples/two-calendars.txt

@@ -0,0 +1 @@
+This file has an (incomplete) timestamp with two different calendars.

examples/unknown-notary.txt

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+This file's timestamp has a single attestation from an unknown notary.