Rename README to README.md

Change-Id: I9e4aa814f1686f7f0458b3b222fb364257ebd401
Reviewed-on: https://weave-review.googlesource.com/2181
Reviewed-by: Alex Vakulenko <avakulenko@google.com>

README.md

diff --git a/README b/README.md
similarity index 100%
rename from README
rename to README.md

examples/daemon/README.md

diff --git a/examples/daemon/README b/examples/daemon/README.md
similarity index 100%
rename from examples/daemon/README
rename to examples/daemon/README.md