Move some author testing into xt

I like the POD and MANIFEST author tests that module-starter(1p) made
for me, but I don't like the env variable invocation for them much. I've
put them in xt instead so I can do `prove xt`.

1 files changed, 3 insertions, 0 deletions

diff --git a/MANIFEST b/MANIFEST
index 2fa6089..36266c9 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -5,3 +5,6 @@ MANIFEST
 README
 t/errors.t
 t/words.t
+xt/manifest.t
+xt/pod-coverage.t
+xt/pod.t