Rework tests

Split along multiple files, produce TAP output, rely on Perl's prove for
running them. Improves clarity and hopefully makes it easier to add new
tests in the future.

t/0000-RFC-4226-Test-Vectors.t

@@ -0,0 +1,24 @@
+#!/bin/sh
+[ -n "${0%/*}" ] && cd "${0%/*}"
+. ./lib.sh
+
+if [ ! -x ../otpcli ]; then
+	plan 0 "skip: build otpcli first"
+	exit 1
+fi
+
+# base32("12345678901234567890")
+key=GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ
+
+plan 10
+
+check "counter 0" 755224 ../otpcli -H 0 "$key"
+check "counter 1" 287082 ../otpcli -H 1 "$key"
+check "counter 2" 359152 ../otpcli -H 2 "$key"
+check "counter 3" 969429 ../otpcli -H 3 "$key"
+check "counter 4" 338314 ../otpcli -H 4 "$key"
+check "counter 5" 254676 ../otpcli -H 5 "$key"
+check "counter 6" 287922 ../otpcli -H 6 "$key"
+check "counter 7" 162583 ../otpcli -H 7 "$key"
+check "counter 8" 399871 ../otpcli -H 8 "$key"
+check "counter 9" 520489 ../otpcli -H 9 "$key"